Olive is just an average girl (with above-average parents), but when her family moves into the old McMartin home she discovers a house full of mystery and adventure. After finding an old pair of spectacles, she soon realizes that they enable her to enter any painting in the house. But the fun does not last long as she begins to recognize a sinister darkness about the paintings, and a tragic tale for those trapped within them. With the help of the house’s guardians—three cats named Horatio, Leopold and Harvey—and a boy named Morton, Olive fights to release the paintings and their inhabitants from the evil clutches of old man McMartin.