Marlin, a cat from the Outer Banks of North Carolina, believes he is a dog. He lives with his human parents, Caroline and Mack, and his four dog siblings, Buxton, Hattie, Shady, and Buoy. Marlin enjoys doing everything the dogs do and has learned from them. He follows them everywhere and acts like their little brother. Caroline says he can be annoying but entertaining. Marlin has a fun and adventurous life, joining the dogs on trips to the beach, swimming, and even fishing on a boat.