Guy Haines is a successful architect.Charles managed to find Miriam at an amusement park in Metcalf and strangles her.Charles regularly appears in Guy's life demanding that he fulfill his end of the bargain.Guy meets Miriam's former lover, Owen.Guy confesses his involvement in the two murders.He feels that murder is an appropriate retribution for Miriam's unfaithfulness.He is married to Miriam, who has been unfaithful to him.Guy is reading his book while taking the train home to Metcalf to meet Miriam.On the train, he meets and has dinner with Charles Anthony Bruno.He is also a psychopath and a playboy.He convinces Guy that if Miriam were dead his problems would be solved.Charles tricks Guy into swapping murders.Both of the murders will be difficult to solve because there will be no apparent motive for the crimes.While Guy is traveling in Mexico, Charles murders Miriam.Guy learns of Miriam's murder in a phone call from his mother.Charles threatens Guy by writing anonymous letters to Guy's colleagues and friends.He eventually fulfills his end of the bargain and murders Charles' father.Guy now feels doubly guilty for two different murders.During this time, the two murders are being investigated.Detective Gerard discovers that Charles and Guy met on the train.Charles reappears in Guy's life in Canada and the three of them go sailing.He is still racked by guilt over the murders.Miriam's lover absolves Guy of the guilt.Without him knowing, Detective Gerard overhears Guy's confession of guilt through a telephone that is off the hook under the bed.When Gerard confronts him, Guy turns himself in for the crimes.Guy now loves Anne Faulkner and wants to marry her.Charles is a wealthy young man.Charles wishes his father was dead because he refuses to give him money.Charles will murder Miriam if Guy will murder Charles' father.He follows through on the plan.Not only did Charles commit murder, but he also threatens Guy.Charles will tell the police that Guy paid him to kill Miriam.If he turns Charles over to the police, Guy could still be considered an accomplice to murder.Guy collapses under the pressure of his guilt and fear.He is also seen from a distance by one of the servants.His face and hands get scratched.He is consumed by guilt.He despises Charles but is connected to him by a terrible bond.The psychopathic Charles, on the other hand, acts as if nothing has happened.He tries to spend time with Guy and causes a scene at Guy's wedding to Anne by showing up uninvited.Arthur Gerard, a private detective, believes that Charles is in some way guilty of his father's murder.After learning of their connection, the detective comes up with the theory that Charles murdered Miriam.In an accident, the drunk man falls overboard.Despite the rescue attempt, Charles drowns.He wants to get divorced.He is also thinking of his lover, Anne.Over dinner, Charles gets drunk.It will be a perfect crime.Guy does not think that Charles is serious about his offer.Guy hopes he will never see the man again.Charles, however, is dead serious.This will lead to terrible consequences for both men.Guy fears that Charles may be guilty.His fears are confirmed when Charles gets in touch with Guy through phone calls, letters, and cards.If Guy does not kill his father, Charles will go to the police.Guy does not know what to do. He feels trapped.There is no way out.But if Guy does nothing, Charles will accuse him.As the months pass, Guy does not turn Charles in. He also does not murder Charles' father.He asks Anne to marry him.He tries to live a normal life.Charles sends Guy a plan for the murder, a weapon and even a map of his father's house.But his crime is not perfect.He leaves some of his torn gloves behind on a tree branch.Guy moves to Canada with Anne.Anne becomes pregnant.Charles had become a friend of Anne's.As often happens, Charles gets drunk.Even though he hates him, Guy risks his own life and tries to rescue Charles.The detective's murder investigation dies along with Charles.But life does not get better for Guy.He misses Charles.The meeting takes place in Guy's hotel room.