A woman discusses her family problems with a stranger she meets on a bus, but is horrified when her confidante suggests each of them kill the person making the other's life difficult.

Two women with completely different backgrounds meet by chance while taking the bus. As they reveal their family problems to each other, Molly begins to fear Sophie when she proposes that she is willing to kill the ex-wife of Molly's husband if Molly will kill her father. Sophie's psychosis escalates to murder, but is Sophie just mentally ill or is there a motive behind her madness?—Anonymous