Hulk saves the day when the Super Hero Squad find themselves facing a huge slime monster. Then, Reptil is sure that Valentine's Day will be the day that all the girls declare their love for him, but he is in for a big surprise.
The Silver Surfer calls an old friend for help when the Collector's henchmen Man-Wolf and Drax the Destroyer start collecting Earth's super-powered beings for him. Then, Thor tells Iron Man all about himself.
On Valentine's Day, a bet between Enchantress, Screaming Mimi, and Mystique has the super-villainesses using their feminine wiles on the Super Hero Squad to see how many of their fractals each can get her hands on.
Dr. Doom plans to travel back in time to claim the Infinity Sword for himself, but when the Super Hero Squad show up to stop him, the villain's time platform is damaged in the fight and all of the heroes and villains present are reverted to infants except Reptil.
After foiling the crimes of both Electro and the Scorpion in one night, Spider-Man finds himself being dogged by two very angry enemies until he comes up with a plan to end the chase.
