Harley and crew try to infiltrate Mr. Freeze's lair only to become human lab rats for his experiments to find a cure for his cryogenically frozen wife, Nora.
Harley Quinn has finally broken things off once and for all with the Joker, and attempts to make it on her own as the criminal Queenpin of Gotham City. The series features Harley Quinn, Poison Ivy and a whole cast of heroes and villains, old and new, from the DC Universe.
Harley Quinn - Thawing Hearts Synopsis and Schedule