AllMovie

There has never been any love lost between handsome, dissolute playboy Ernest Mullett (Peter Lawford) and his homely, hardworking brother, Farnum (Roger C. Carmel). The sibling rivalry intensifies when Farnum manages to take over Ernest's money, his job, his wife, Judith (Martha Hyer), and even his mistress, Barbara (Julie London). What we have here is a classic "Cain and Abel" situation -- and Ernest intends to literalize this Biblical allusion by eliminating Farnum for good.