Start the second task of the Triwizard Tournament at the Black Lake! With Hermione Granger and Ron Weasley enchanted underwater, Harry Potter and Viktor Krum, with his head transformed into a shark's head, must race to save them. Find the Gillyweed that will help Harry breathe underwater and give him flippers. Dive from the dock to rescue Hermione and Ron. But watch out for the Merperson and the Grindylow!