On Valentine's Day, Joker's plans to become Cupid backfire when all of Gotham's women relentlessly pursue him. Will Batman be able to save the Joker from the not-so-angry mob--not to mention Harley Quinn's wrath? Then, during the Lunar New Year's celebration in Chinatown, a rare artifact is stolen. Damian Wayne, Bruce's son, takes the case. Along the way, he gets a history lesson from Alfred in addition to a real mean martial arts lesson from Katana!