Kat's world turns upside down when a tail sprouts from her body and cryptic, blazing text materializes before her eyes. With her best friend Lily struggling to process the transformation and the mysterious Sylvie offering cryptic guidance, Kat must navigate a bewildering new reality where she's bound by demonic contracts and summoned across dimensions week after week. Every summons brings fresh chaos, unexpected opportunities, and bizarre challenges that test her sanity and her bonds of friendship. As Kat grapples with her newfound demonic nature and uncovers the truth about her strange powers, she discovers that answering the call of otherworldly summoners might be the key to understanding who she's becoming—and perhaps finding unexpected romance along the way. Caught between worlds and racing against time, Kat must master her abilities while juggling the complications of her transforming life with Lily by her side and Sylvie's enigmatic wisdom guiding her forward.