The last week of the school year is one party after another! Stella the Mouse, Nico the Toad, Delilah the Spider, and Bo the Parakeet are animal best friends who live in a school, and they LOVE parties. The four friends are so excited to take part in the fun. But then, oh no! When the students get on the bus, the teachers all wave GOODBYE! They will be gone all summer long! How will the four friends make it until they see their child friends again in the fall?