议员的儿子吉姆·考德威尔神秘死亡，与他秘密结婚的女人桑德拉·马歇尔作为遗产的合法继承人，来到考德威尔家的老宅与吉姆的叔叔马克交涉。在此逗留期间，桑德拉发现马克行为诡异，而从吉姆的妹妹茱丽口中得知的关于马克的种种怪事也让她怀疑马克与吉姆的死有关。不久茱丽意外身亡，更使桑德拉坚信吉姆之死是马克所为。桑德拉开始着手调查此事，被马克发觉，两人互相堤防......

Hilary Fairfield returns home after fifteen years in an asylum with his sanity restored. But he is disturbed to find that everything has changed: his daughter grown and about to marry; his wife divorced and also about to marry.

Glen, a former sperm donor and recently diagnosed sociopath, takes his daughter on a murder spree of his sperm-donated offspring in the dark comedy, 'Spermicide.'