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Arnold and Kimberly hitchhike to get home for Mr. Drummond's birthday party and are picked up by a man who takes them to his apartment and tries to have his way with Kimberly.
Mr. Drummond tries to make a business deal with exercise instructor Maggie McKinney and falls in love with her.
Arnold escapes from the kidnapper and makes it home, but leaves Kimberly behind and can't remember where she is. A policeman helps Arnold remember by hypnotizing him and getting him to reveal the license plate number of the kidnapper so the police can track him down to arrest him.