Josh's family is used to changes—but now they are hurtling into even more. Although Josh has always had an affinity with animals, it’s his younger brother Jamie who falls under the all-pervading wild cat spell.

“Leo” seems to have taken over Jamie’s life. He eats when and what he wants, speaks only when he needs to. Soon it becomes impossible for the family to cope with his frightening, unpredictable behavior. Only Josh understands his brother’s moods, but is he brave enough to break through Jamie’s unhappy mask, and save them all? ( )