Batman (George Clooney) and Robin (Chris O'Donnell) face the biggest challenge of their lives: Mr. Freeze (Arnold Schwarzenegger)! Mr. Freeze was originally a scientific genius, but an accident made him rely on emergency machines for survival. What's worse, unless he keeps the temperature of the entire Gotham City below zero, his beloved wife will never wake up. Mr. Freeze begins to build his own frozen kingdom step by step. Batman will be the biggest obstacle to this plan. Mr. Freeze urgently needs to get rid of this thorn in his side. Robin gradually becomes Batman's right-hand man, and the two work together to resolve Mr. Freeze's conspiracy again and again. But the appearance of the beautiful Poison Ivy (Uma Thurman) brings crisis to the relationship between Robin and Batman: Poison Ivy takes advantage of Robin's feelings for her and sets traps step by step, inducing the two to suspect each other. Can Batman and Robin finally resolve their misunderstandings and defeat Mr. Freeze and Poison Ivy?