Splat the Cat can't wait to be a big brother. So when his mom brings home a special little guest, Splat races from his room, slides down the banister, and skids across the hall, only to find his mom holding... a crocodile?! It's not the baby Splat was expecting, but he's determined, no matter how messy, smelly, and tricky it gets, to be the best big brother he can be!