The old, abandoned water park, Splashopolis, has been taken over by vampires! Locals have been going missing, animals have become dangerous around the park, and the slides have been twisted into the dreaded Castle Hydrocula. You and your comrades call yourselves UPDN (Undead Pursuit, Destruction, and Neutralize), and it’s your job to flush them out. Your plan is to get the innocents out safe while taking down the vampires with your tools and your wits. It’s a hot day at the waterpark, but do you and your team really have the advantage against this so-called Hydrocula and his vampire minions?