Nobody loves Christmas like Bea Tanaka—so when her family visits her for a special holiday celebration, she's beside herself with joy. After years of chaos, questionable decisions, and flirtations with the supervillain path, Bea is finally thriving. She's got a sweet new gig hunting demons in Maui, she's working hard to hone her powers, and her big sister Evie is proud of her at last. In fact, everyone is so proud of her that she can't tell them the truth: she's feeling lost and adrift. She and her boyfriend, Sam Fujikawa, are struggling to make their long-distance love work, and her powers are displaying some intriguing new elements—elements that could lead her down an evil, mind-controlling path once more. When her family's holiday visit is disrupted by otherworldly monsters rising out of the Maui ocean, Bea throws herself into the battle—until she's suddenly and mysteriously transported to the perfect Christmas back in San Francisco, surrounded by her family and an excess of merrymaking. As she finds herself trapped in the bizarre holiday rom-com of her nightmares, Bea must unravel a treacherous demon plot, save the world from unspeakable evil, and resist the siren song of a supervillain destiny. And hey, maybe she'll find time for a little holiday cheer after all...