When Lindsey Parker's widowed father announces that he is to remarry, Lindsey does what any good daughter would do: wishes him congratulations then sets about trying to kill his fiancée, Karen. Fortunately, the murder attempt fails but Lindsey still succeeds in driving Karen off. It doesn't take long, however, before Lindsey realizes that her father's heart really is broken and the only way to mend it is by getting Karen back. But Karen already has a new man - mysterious entrepreneur. Lindsay enlists the help of an old schoolmate, now private detective, in an attempt to break this new couple up, but when on her friend's advice, Lindsay turns honey-trapper and sets out to seduce her ex-future-step-mother's new man, she finds herself falling in love . . .