It all begins on a train, blowing its whistle as it brings passengers closer to their final destinations. Two of said passengers are Guy Haines and Bruno Antony, who begin as mere strangers on a train, but become entirely too intertwined after they part ways.
Bruno, an overbearingly obsessed fan of Guy—a socialite and famous tennis player—begins to air his dirty laundry soon after meeting his idol, explaining to him how he wishes his judgmental, callous father was no longer in the picture. Having studied his new acquaintance’s life prior to their meeting, Bruno begins to inquire about the public separation between Guy and his promiscuous, soon-to-be ex-wife Miriam—and his secret, budding relationship with Anne Morton, a Senator’s daughter.
With both men leading such hectic personal lives, Bruno makes a suggestion to end both of their suffering—that they murder each others’ most irksome foes. Despite Guy’s immediate refusal, when the pair part ways they leave not knowing the other’s true intentions.
