A driver named Agata hits a boy on a deserted road and is subsequently run over and falls into a coma. Her twin sister Catalina is somehow connected to Agata's fate and becomes aware of her sister's distress, leading her to team up with their friends to investigate a series of supernatural occurrences at the accident site.
KM 31: Kilómetro 31
A car crash puts Agata in a coma, and as her twin sister Catalina delves into the mystery, she stumbles upon a haunting legend connected to the notorious Km. 31 marker, leading her down a dark and frightening journey of discovery.