Cat's Cradle

In Sao Paulo, the upper middle class teenagers Cristiano, Francisco and Gabriel have just joined the university and on the eve of the opening class, they go to a party with drugs and booze. On the next day, after their classes Joana, the date of Cristiano comes to his house and the three friends rape her. The girl dies, they panic and decide to get rid off the body, but Cristiano's mother arrives, startles with Gabriel and rolls the staircase, breaking her neck. The trio decides to burn the corpses in a garbage dump, but along the night other tragedies happen.