In her second year at Arcanum Training Institute, Ella grapples with fame, unearths a perilous school secret, and faces a mysterious magical illness outbreak, prompting her, alongside Brigit and Jason, to clear her name, while working tirelessly to safeguard the Marvellian realm from impending chaos.

"What if young Arthur Conan Doyle really went to a secret school for extraordinarily gifted children called Baskerville Hall? When a mysterious man with a pipe notices young Arthur's incredible deductive skills, Arthur's offered a spot at the esteemed Baskerville Hall and a chance to lift his family out of poverty. There Arthur makes quick friends with Irene Eagle, a girl who boldly strides into any adventure, and Jimmie Moriarty, a boy whose brilliance...