Who Summoned It? is a humorous detective adventure whose plot revolves around a massive disaster in the fairytale kingdom of Knotgood. A disrupted wedding festival led to the death of the monarch beneath the ruins of the citadel and the emergence of a ghostly monster named Buglo. To save the land, rulers of various elements, including the Mountain King and the Cloud Queen, recruit experienced investigator Ricky Roktow. The player assumes the role of the sentient Scroll of Truth, physically incapable of recording false information.