On an impressive and remote Norwegian island, two sisters, Ida and Tuva, decide to spend some time together and disconnect from their daily routine, unaware of the imminent danger that awaits them. While exploring the vivid waters of the ocean, a moment of fun turns into a nightmare when an unexpected disaster traps them underwater. Ida, the older sister, finds herself stuck in an underwater cave after an accident during a diving session, leaving Tuva alone on the surface, desperate and tormented.
As time goes on and tension mounts, Tuva is forced to confront her own fears and find a way to rescue her sister. With limited resources and the pressure of time working against her, the young girl must summon the strength to plunge into a dark and hostile world. During her struggle to save Ida, old resentments and family secrets resurface, adding an emotional layer to her fight for survival.
With an atmosphere of suspense and tension that keeps the viewer on the edge of their seat, this story explores not only the bond between sisters but also human resilience in the face of extreme adversity. The perfect blend of psychological horror and family drama makes this underwater adventure an unforgettable experience that will make you think twice before diving into the sea.