The mysterious arrival of a foreigner to a small village in a Mediterranean island, awake the sudden interest from a diverse group of residents, who will appear unexpectedly in the stranger's life, believing that he's going to reopen an old shop. In contrast, the real intentions of the stranger are hidden behind an old Polaroid photo, which has led him to that place in search of answers.

Gori, a young idealist who spends his summer in Mallorca, tries to persuade his friends and his ex-girlfriend, to accompany him to the last summer festival on the other side of the island. What his friends do not know is that he is looking for a mysterious girl he met during the summer.

Four young people come to Mallorca to enjoy idyllic summer holidays, but delving into the most inhospitable places on the island will begin a hellish journey.

Carles, Pau and Dante meet at the funeral of their friend Tolo. They soon discover that a mysterious briefcase is related to their friend's death. Violence, lies and bizarre situations revolve around this briefcase and the protagonists of "408".