The Visitor (1974)

In this off-beat romance, a grad student rents a house for three weeks to do her research. Soon after arriving, she discovers the house is haunted by a handsome and interesting ghost. Eventually the spirit and the student fall in love. During their affair, they teach each other much about their different backgrounds. In time the woman finds herself confused by the bizarre affair. To save her sanity, she escapes from the house.

Drama