Bob, an average man, finds himself in a strange new world. He receives a message from an unknown source, asking him if he wants to accept the system. Curiosity getting the better of him, Bob accepts the system and is granted the Summoners Rolodex, a cursed item that allows him to summon monsters. But there's a catch: every time he uses the Rolodex, he risks temporarily turning into one of the monsters he summons.

Bob soon learns that he must climb the Tower of Trials. Which is filled with traps, puzzles, and increasingly difficult enemies, to reach the top and claim his reward. Which might just be a way for him to go home. But as the challenges grow more difficult and the stakes become higher, Bob begins to wonder if he's in over his head. With every use of the Summoners Rolodex, he grows stronger, but so does the Rolodex.