From the Lego website:
Doc Ock is wading through the water in his weaponized Octo-Bot and has taken White Tiger prisoner in one of the tentacles! Steer Captain Stacy's speedboat with Spider-Man surfing in on his web surfboard tow and rescue her! Watch out for Vulture nosediving through the air and fend off his attacking claws, and make waves with a heroic rescue.
Includes 5 minifigures: Spider-Man, Doc Ock, Vulture, White Tiger and Captain Stacy.