Of all the creatures in the ocean, sea horses are Echo Reef's favorite. They're sweet and gentle and they glide through the water so gracefully. When Echo discovers that Rocky Ridge, one of her Trident Academy classmates, has his own pet sea horse, she wants one right away. Not everyone agrees sea horses should be pets, however. Perhaps they are happiest when swimming freely. But Echo thinks that if Rocky can make a sea horse happy, she can too! Can't...

In the nineteenth century, ten-year-old Florence Crutchfield leaves a London orphanage to live with her great-uncle, great-aunt, and sickly cousin James, but she soon realizes the home has another resident, who means to do her and James harm.

Farm puppy Bo feels left out and jealous when his best friend Scrapper comes to visit.