Since Haly's Circus was set to open in Amusement Mile, there have been numerous posters put up to advertise it, many of which feature Jimmy the Clown as their poster-boy, though he is not eager to be the focus of attention. Unfortunately for Jimmy, the posters have caught the eye of the Joker, who is apparently annoyed by the resemblance between Jimmy's character and himself. One night, as Jimmy separates from his friends to get a drink, Joker attacks him in an alley, infecting him with Joker Venom.