John Moulder-Brown plays a teen-aged London bathhouse attendant who forms a business alliance with female attendant Jane Asher. The object is to obtain better tips from their clients, but soon the impressionable Moulder-Brown falls in love with the older Asher. Brushed off by the girl in favor of a handsome swimming instructor, Moulder-Brown makes several halfhearted attempts at revenge. When the boy and girl finally do get together sexually, the event is motivated by lust and has tragic results. Deep End observes how adolescent obsession can mushroom into disaster if one doesn't have the emotional equipment to cope.
~ Hal Erickson, All Movie Guide