Living Dead Girl — Tod Goldberg

After his estranged wife disappears, a husband returns to the remote lake house where their young daughter died, and he soon loses his grip on reality.
 
Paul Luden has been haunted by a memory he can't recall. Whatever happened to his marriage, to his two-year-old daughter, is too traumatic to remember, so his unconscious has chosen to block out key details. But when he receives a phone call from the small lake town where they'd lived, telling him that no one had seen or heard from his wife in ten days, he knows what he has to do.
 
He and his nineteen-year-old girlfriend drive from L.A. to Washington State where he's forced to confront his past. And as he pieces together his buried memories, Paul unravels mentally, falls into self-destructive trances and ultimately discovers the truth about his wife.