Two inseparable cousins - Pacifica Southeast and Gideon Pines - are send by their parents to spend their summer vacation at their uncle Bud's Mystery Shack, which is located inside Depravity Falls, where there have been reported a series of mystery murders, which nobody can solve. There, the cousins meet The Gleeful Twins, who perform magic tricks at The Tent Of Telepathy. They are well mannered - in front of people with high social status - well dressed, and somehow, they manage to make these dangerous circus tricks seem like it is actually harmless magic. But.. that can't be true, right? Magic isn't harmless, and it always comes with a very expensive price many choose to pay, no matter what the consequences.