The Killer of Dolls (1975)

Paul is a deranged young man who was kicked out of medical school for being too nervous around blood. Living in a public park owned by a Condessa, he spends his days tending the flower beds, but a strange supernatural force behind a doll mask forces him to commit grisly murders. Everything changes when he meets the sweet Audrey, the Condessa's young daughter. But the doll entity demands more blood.