Now that their owners are married, Stick Cat and his best friend, Edith, live in the same apartment. There's someone else in the family too--Millie, the new gurgling, babbling baby. When Edith declares that Millie's sounds are actually flattering compliments about Edith, her devotion to the new baby is complete. There's harmony in the home--until Grandma Cobb arrives to babysit. That's when things quickly spin out of control. A mishap leaves Grandma trapped inside the bathroom--and locked away from Millie. Stick Cat needs to rescue Grandma. But he also needs to help Edith in her new role as babysitter-in-chief. It just might be Stick Cat's toughest mission ever.