The Big Underwater Dream of Wrennie, tells the tale of Wrennie, a little wren bird who dreams of exploring the ocean's depths like his fish friends. His dolphin friend, Dory, explains that wrens aren't built for underwater life, which makes Wrennie sad. To cheer him up, Dory gives Wrennie two shiny scales to help him swim. Despite his best efforts, Wrennie cannot breathe or stay underwater. He eventually gives up the scales, flies high into the sky, and discovers the unique beauty and joy that only he, as a bird, can experience. The story concludes with Wrennie embracing his own identity and finding happiness in his ability to fly.