these people get on The Ruins and the Mexicans are down the bottom not letting them go, (Incase they catch what they got), and thats these sticky plants get inside their bodies and start moving around..They then have to cut them selves to get the sticky plant out..Lots of cutting and blood

..In the end the one lad distracts the Mexicans , so that the girl can escape in his jeep, he gets shot dead..

Ended with some more tourists going up the Ruins, like another film gonna be done..lol