Pet owners know that a cat's loyalty is not easily earned. Boo, a resourceful young feline with a keen eye and inquiring mind, has nonetheless grown intensely devoted to her human companion, Carrie. Several days ago, Carrie--or Mother, as Boo calls her--suddenly went away, leaving her family, including Boo, in disarray. Carrie's husband, Tommy, is distant and distracted even as he does his best to care for Boo's human siblings, especially baby Finn....