A woman (Patty Duke) becomes suicidal after learning her lover (Martin Sheen) is a killer. Derived from the series "Matt Lincoln."

Two episodes of the 1970-71 TV series Matt Lincoln were welded together to create the made-for-TV "movie" The Cliff. In one of the episodes, Patty Duke plays a suicidal unwed mother who struggles over whether or not to give up her child for adoption. In the other, Martin Sheen plays a homicidal maniac who keeps in touch by telephone with suicide prevention center psychiatrist Matt Lincoln (Vincent Edwards). Through a little juggling and an additional line or two of dialogue, the two separate plot lines become one.—Hal Erickson