When the dog from next door, Pony's sworn enemy, comes to stay with them, Annie needs to find a way to make them get along.
In the park, Pony is having ice cream, but gets startled by his enemy, Dog which made Pony dropped his ice cream. In retaliation, Pony throws Dog's toy ball in the bush. As Dog goes after it, he gets carried off by a truck. Pony is making an ice sculpture of himself, but it gets ruined by Dog. At the park again, Pony chases Dog with a steamroller, but ended up in the pond.
At home, Annie gives Pony a bath and tells him he should get over whatever rivalry he has with Dog, but Pony says it’s impossible and Annie assures him there’s good in everyone.