Diego and Luna love to play in the park. Luna chases butterflies and barks happily.

Diego notices Luna slowing down. He takes her to the vet, where they meet Dr. Parker.

Dr. Parker tells them Luna is getting older. Diego feels sad but determined to help Luna.

Diego makes Luna a cozy bed. They snuggle and Luna licks Diego's face.

Diego changes their walks to shorter ones, but they still have so much fun.

Diego and Luna have a picnic in the backyard and share some delicious snacks.

Diego hugs Luna and thanks her for being the best friend ever. They fall asleep peacefully.