The male drummer of a rock band doesn't take part in arguments that come to the fore between his fellows, but prefers to observe everything and prepare himself for his first time as a soloist.

Five high school classmates fail an exam and must take it again in December. Looking for revenge, the group, led by Miguel, decide to come up with a plan to pass the exam no matter what, but they do not measure the consequences.

Juan is a family man; he feels at ease with his life and his work, and with his wife and two children. Everything seems to indicate that the summer holidays in Aguas Verdes are going to be a pleasant time. An unexpected element, however, triggers Juan's mental imbalance.