Melvin Udall is your misanthropic, obsessive-compulsive neighbor—the kind of man who washes his hands with a new soap bar each time and won’t step on a crack. But beneath his abrasive exterior, something fragile stirs. When forced to care for a dog, then a broken artist, and finally confront his feelings for the only woman who tolerates him, his rigid world begins to crack. Can he change?

Rubisviel Fyaril, the Orchid Butterfly Witch of the Dark Forest, seeks freedom from a family curse by summoning a hero. But a botched ritual and a stolen catalyst instead unleash Aleister, a powerful, memory-wiped Demon Prince from the 7th Circle of Inferno. Now bound to her, this arrogant, surprisingly charming demon turns Ruby's quiet life upside down. Can she tame the infernal prince who just wants to eat her cat (or her)? Or will their reluctant partnership unleash a new kind of chaos?