Peter Proud (Michael Sarrazin) is a college professor haunted by recurring nightmares of being killed by a lady named Marcia. He recognizes the site of his dreams as a place in Massachusetts. When he travels there he meets an older lady named Marcia with a daughter Ann.
Ann and Peter fall in love. Marcia realizes that Peter is the reincarnation of her husband that she killed. Marcia thinks the relationship between Peter and his daughter from a past life is incest, and is also afraid that Peter will seek revenge for her killing him in his past life. Marcia kills Peter again at the same lake.
Thanks Joseph C!