During a beach excursion, Nfissa, a young mother, is violently sexually harassed and drowned by a group of young men after she absent-mindedly swims into their midst. Nobody seems to witness her disappearance. Anxiety and fear grow among her family, especially as, on the same beach, bathers suddenly start dying en masse.

Salima, an independent artist, finds a cell phone on her way. What seems like an everyday occurrence soon turns into a disturbing experience: insistent calls, a voice demanding answers, and tension that drags her into losing control of her own reality.