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The plot of Less Than Kin hinges upon the astonishing resemblance between its two protagonists (both of whom, for the sake of convenience and "box-office insurance, are played by the popular Wallace Reid.) The story opens in Central America, where Lewis Vickers (Reid) has fled to escape prosecution for killing a man in self-defence. Likewise in the vicinity is Robert Lee (Reid), who though not wanted by the Law is in all-around heel. When Lee dies, Vickers assumes his identity and returns to New York. Here he is welcomed by Lee's family, though not exactly with open arms. Upon learning about the various skeletons in Lee's closet, Vickers sets about to right the wrongs perpetrated by his alter ego. He also rescues Lee's stepsister Nellie (Ann Little) from a disastrous marriage, thereby winning the girl for himself. As for the spectre of arrest that hangs over Vickers' head -- well, even that is disposed of in the waning moments of the film.