WEDDING BELLS RING! As winter melts to spring and the marriage of power couple Black Canary and Green Arrow looms large in Gotham City, Harley Quinn and Poison Ivy struggle to pick up the shattered pieces of their friendship-turned-situationship...and a shocking revelation turns Catwoman's relationship with Batman upside down. Even the bride- and groom-to-be face their own rocky walk down the aisle on their wedding day...one that the killer Horoscope is determined to make a bloody affair!