A frustrated, unemployed teacher joins forces with a scammer and his girlfriend in a blackmailing scheme.
In an attempt to pull her family together, Adèlle travels with her young daughter Sarah to Wales to visit her father. The morning after they arrive, Sarah mysteriously vanishes in the ocean. Not long after, a little girl bearing a striking resemblance to their missing daughter reveals that she has retuned from the dead — and that Sarah has been taken to the Welsh underworld.
When Simon awakens in the hospital after surviving a near-fatal accident, amnesia has erased the last two years from his memory. He learns that his brother was killed, he has married a woman he doesn't remember and he's haunted by strange visions of the woman he loved.
