The Breathless

An interesting plot, suspense, and psychological horror, a girl loses her sister in an accident in which her boyfriend also disappears. The suspicions fall on him, but one night he shows up at home without remembering anything about what happened. (Translated from Spanish)

Imagine your the quiet, perceptive sister. Your older sister, Ro has been dead for a year, last seen alive by her missing boyfriend Cole. She was found dead and covered with blood on the beach, Cole holding her, but when discovered, he ran away. Now you watch your other sister try to snag a boyfriend and your father slowly get swallowed in alcoholic-fueled grief. Your only support comes from your grandfather who suffered a stroke the day Ro died. Meet Mae, an avid reader and sketcher. She's still trying to figure out what happened to Ro, while holding things at Blue Gate Manor together.
When Cole, missing for nearly a year, comes to in a hospital, he can't remember anything except for an accident on his motorbike. Desperate to return to Ro, he sneaks from the hospital and hitches a ride with a trucker back to Blue Gate Manor. When Mae confronts him with the fact that Ro is dead, nearly a year has passed and everyone believes he killed her, these revelations set in motion a murky, twisty chain of events that alternate between members of the Cole family 150 years before, witchcraft, and an uneasy alliance between Cole and Mae to determine what really happened to Ro the day she died. It's an engrossing story, but I was troubled by the lack of an explanation regarding where Cole was during the year he vanished and I wasn't completely satisfied with the ending.