A group of friends whose leisurely Mexican holiday takes a turn for the worse when they, along with a fellow tourist, embark on a remote archaeological dig in the jungle where something evil lives among the ruins.

Amy: We're being quarantined here. We are being kept here to die!
Jeff: This doesn't happen! Four Americans on a vacation don't just disappear!
Amy: Do you think they're going to find us?
Eric: Honestly, I think making a run for it is our only chance.
[from trailer]
Stacy: Why are they doing this?
Jeff: It has something to do with the ruins.
Eric: We could be walking through an ancient graveyard right now, like a bone depository or something.
Stacy: I doubt that.
[Eric mimics Stacy to himself]
Stacy: Did you just mimic me?
Eric: No, no I was just agreeing with you.
Amy: No more cutting for today.
Eric: So, there was this girl who got really really drunk one night...
Stacy: ...but she sobered up really really quickly...
Mathias: Who is this?
Amy: Just a stupid game they were playing last night.
Eric: ...but not before she stuck her tongue down some guy's throat.
[Amy knocks Eric's hat off]
[after seeing the vines nearly choke Mathias to death - which was planned by the vines to happen regardless of the group's help]
Eric: [sarcastic / deadpan] Well, thank God we cut his legs off.
Mathias: [after uncovering hidden path] It's here. This must be it.
Amy: That's the path? Why was it covered?
Stacy: I don't think that's the right path.
Jeff: [to Mathias] It's on the map?
Mathias: Yeah.
Jeff: [to Amy] It's on the map.
Amy: Jeff, did you see how old that map was?
Stacy: And it was covered. Why would it be covered?
Jeff: Maybe the archaeologists don't want people finding the site, guys.
Amy: [sarcastically] Well great, they're going to be thrilled to see us then.
Jeff: [grabbing a water bottle from Stacy] We should save this.
Eric: Hey, she's thirsty.
Jeff: I know, it's just that we don't have that much.
Eric: Well why do you get to decide Jeff?
Jeff: Okay, well we can all decide. But just keep in mind that each of us needs a half a gallon of water every day just to survive. And right now, we don't even have a day's worth.
Amy: [after the taxi leaves] Wait, how are we going to get back?
Jeff: [holding business card] Well, we're going to call him when we get out.
Amy: With what? We're not going to get a signal out here.
Mathias: Yeah, my phone should work. It's a world phone.
Eric: [holding his cell phone] Hello, can you hear me now?
Jeff: Eric, get your phone out.
Eric: There's no signal.
Jeff: Really? Because if there was a signal on the road, you should...
Eric: No, I didn't get one.
Amy: What do you mean?
Eric: No, I mean I never said...
Amy: Can you hear me now? What the fuck was that, Eric?
Jeff: How about you? Are you here by yourself?
Mathias: Mm-mm, no, with my brother, but he, uh, left with some girl, ja.
Jeff: Left... here? Mexico, or...
Mathias: Ah, no, no. She's an archaeologist. He went with her to a dig site.
Amy: And what are they digging?
Jeff: Like an excavation?
Mathias: Yeah, some ruins, I think. A Mayan temple.
Jeff: Kind of like the ones that nobody here wanted to go to, the entire time that we've been here.
Mathias: Apparently, it is not even in the guide books. VIP only.
Eric: Yeah, see, Jeff, that's something I would do.
[upon seeing a drunken Amy dancing with Mathias]
Eric: How much you want to bet she kisses him?
Stacy: She's freaking out that Jeff's med school is like two thousand miles away, okay?
Eric: Okay, how much?
Stacy: She's not going to kiss him.
Eric: Alright, you know what? Oral sex, the winner receives.
Stacy: [shaking his hand] Oral sex? Okay.
Jeff: Did you find the phone?
Amy: It's not a phone!
Jeff: Amy!
Amy: No! There is no fucking phone!
Jeff: The police, our parents, the Greeks, somebody. Somebody is going to find us. We just have to be alive when they do.
[first lines]
Archeologist #2: [She is sobbing, then begins to scream:] Help me! Somebody, help! Somebody! Help! Help me!
Jeff: He won't last much longer like this. We have to cut 'em off.
Amy: Cut what off?
Jeff: His legs.
Eric: Tell me you're joking.
Jeff: He'll die if we don't.
Eric: Please tell me you're joking.
Jeff: He'll get infected, if he isn't already. Septicemia.
Eric: Well, what the hell is septicemia, Jeff?
Jeff: An infection, usually in the bones when it's exposed to bacteria.
Eric: You're fucking crazy.
Jeff: I'm telling you he won't last through the day like this.
Amy: Without anesthesia?
Jeff: He has no feeling beneath his waist. The tourniquets are already in place. We gotta cut below them.
Amy: With what?
[Jeff pulls out a knife]
Amy: A knife?
Jeff: We have to break the bones first, and then cut.
Eric: We're not cutting his legs off with a fucking hunting knife, Jeff!
Jeff: There's no flesh covering his bones, Eric. He is going to die.
Jeff: [to Mayans] You don't even know our names. You don't know any of our names. I'm Jeff. Jeff Dean McIntyre. Winnetka, Illinois. Twenty-two years old. I was going to be a doctor. That was my dream. That's all I wanted. You should know her name, too. Her name is Amy! She's not going to die in this fucking place!
Jeff: One of you has to go.
Amy: Go? Go where?
Jeff: Down. We're going to check the rest of the rope and make sure it's secure, and then one of you...
Amy: [interrupting him] Why do we have to go? Why can't you or Eric?
Jeff: Because you're not strong enough. We need to work the crank.
Stacy: [after a long pause] I'll go.
Amy: [screaming while throwing a clump of vines at the Mayans] Why won't you fucking help us?
Stacy: [hurrying to catch the bus] Jeff is going to be pissed if we miss it.
Eric: Oh, the terrible wrath of Jeff, followed by I'm sure the more frightening whining of Amy.
Stacy: She's not that bad.
Eric: No, but I bet she's feeling pretty awkward right now, wouldn't you?
[repeated line]
Stacy: You're not listening to me!
Eric: [smiling after collecting on his bet] Ready?
Amy: What are you so happy about?
Jeff: What's going on?
Stacy: My boyfriend is fucking your girlfriend, that's what's going on!
[from trailer]
Jeff: So what do you guys think: Ancient Mayan temple off the beaten path?
Stacy: I cut my knee.
Jeff: They don't want us to spread it. That's why they won't let us leave. They're salting the soil to keep it contained. It's old. It has to be really old because the birds, the insects... and now, they've learned not to land here.
Jeff: [seeing the Mayans on the ground] They keep coming. They're setting up camps.
Stacy: Why are they doing this?
Eric: Maybe they're preparing for something, like a sacrifice?
Jeff: It has something to do with the ruins. They won't come up here, and now that we're here they won't let us leave.
Eric: So what do we do? Just wait for someone to find us?
Stacy: Who?
Mathias: The Greeks?
Jeff: Dimitri left them a copy of the map before we left.
Eric: Yeah, what if they decide not to come Jeff?
Jeff: Then somebody else will. We're supposed to check out of the hotel tomorrow; the hotel's going to call the police.
Eric: When?
Jeff: Tomorrow, or the day after.
Amy: Our flight leaves tomorrow, Jeff.
Jeff: I know Amy, but we know what happens if we leave.
Amy: [while drunk] Jeff used to play the trombone in high school.
Jeff: Thank you for sharing that with everybody!
Jeff: People come from all over the world just to see these ruins, especially one that's not on the map. I'm not taking you to some tourist trap, honey. Don't you want to have some experience or something to shoot other than the beach, the pool, the beach, the pool?
Amy: Well, you're already dressed, so you might as well go without me.
Jeff: Hey, but I don't want to go without you.
Amy: This is so not okay!
[last lines]
Greek #1: [yelling out] Dimitri?