Finn is in a horrible mood and doesn't want to talk about it, but after some persuading, agrees to go for a hike with Grandpa. Throughout their forest walk, they see many different things: big, strong trees with networks of roots growing underneath, still water with schools of fish swimming below, and an expectant bird with eggs nestled under her. Grandpa explains that people also have hidden feelings beneath the surface, and despite appearances, may be feeling the say way you do.