Apnoia 2011 Greek movie

Dimitri, a 23 year-old swimmer, dives into the water of a dark pool, while he is trained to compete in an European Championship that could bring him success and help his father, who is deep in debt. As his body floats in the water, memories from the past come flooding into his mind, reminding him about his relationship with Elsa, an environmental activist who has mysteriously disappeared.