The Changeling (1980)

Composer John Russell (George C. Scott) is vacationing with his family when a car accident kills his wife and daughter. Distraught with grief, Russell leaves his home in New York City for a giant, secluded house near Seattle. Soon Russell starts to feel the presence of a ghost, a boy who drowned in the bathtub there. Russell seeks the assistance of Claire Norman (Trish Van Devere), who led him to the house initially, in uncovering the secrets of the boy's death.