Otis Pendleton is a kindly, old grandfather rabbit who enjoys the peace and quiet of his cozy burrow. He’s looking forward to a relaxing evening reading with his grandkits, but a summer storm changes his plan. First, he smells the rain. Next, his dog friends report back that the river is rising. It looks like it is time for Otis and all his animal buddies to move to higher ground!

The group—a mismatch of best pals from cats and a dormouse to dogs and a ferret—begin their journey to the big rock, where they’ll be safe. But the trip is anything but easy. Not...