Two friends, a contaminated river and a holiday that will change their lives forever. Tom and Martín's Easter holidays are normally fairly predictable. The two friends up in the mountains with their families,bikes, the river, nature... Nothing particularly memorable apart from seeing one another again and enjoying the friendship that has linked them since they were little. However, now, at almost fourteen and during what looks likely to be their last holiday together, destiny has something in store which will change their perception of the world forever. First they will meet the enigmatic man who lives in the house known as Los Rosales and, later, his daughter Danae. And their arrival will send a jolt through the lives of the two friends which will propel them towards an unfamiliar tension and will show them that we grow up when we lose our innocence.