"Princess Lana can't seem to speak up in class at the Royal Mermaid Rescue Crew School, even when she knows the answer. It's much easier to chat with her new friend, a horned creature named Spike. With Lana's help, Spike discovers he's a narwhal, and together they swim north to find his long-lost family. The chilly Northern Seas are full of new adventures--but also an emergency! Can Lana finally find her voice and save the day, or will she freeze...

"Puppypaw Island is being pranked. Someone has ruined the magic lesson and sabotaged movie night. Can the Cutiecorns catch the prankster and stop the chaos?"--

Lucas and Clara are floating on a raft when a wave casts them into the sea, where Lucas catches a glimpse of a coral kingdom and a dark-haired mermaid helps him, but when his father, King Caleb, hears of this, he scolds Lucas and tells him he has broken an age-old pact.

Clara invites Prince Lucas on her journey to map out the Stone Forest and visit the gnomes who live there.