The Dark

In Wales, Adèlle visits her husband James and tries to repair their relationship with her daughter Sarah. By a cliff, they encounter a mysterious memorial with evidence of a missing plate and the name "Annwyn" marked on it, which local man Dafydd explains as part of traditional Welsh mythology. When Sarah vanishes, another girl named Ebrill appears, revealing she has returned from the dead and that Sarah has been taken to the Welsh underworld, Annwyn.