When 11-year-old Olive moves into the creepy old mansion on Linden Street, she discovers the house holds a powerful secret. The strange paintings on the walls are not just art—they are windows into a magical world called Elsewhere. With the help of three talking cats who serve as guardians, Olive must unravel the mystery of the house's previous owner, a sinister painter, and stop the dark shadows within the paintings from escaping into her own world.