"Finn's friend Sheila, a magical selkie and shape changer, dives into the sea to rescue him from a storm, but in doing so she gives up her life as a girl and returns to being a seal"--Unedited summary from book.

Mayday, Mayday! A rough storm has caused a boat to break loose and run aground on the rocks. Black, greasy oil is leaking from it's engine fast. And there are very curious harbor seals in the area, along with other wildlife! This disaster is what Sofia and Max find when their magical boat, Wind Rider, drops them off at Scotland's beautiful craggy coastline for their latest mission. These two friend must figure out a way to quickly contain the spill...

While enjoying a full day of their favorite activities, a group of young penguins helps a baby seal that has been separated from her mother.

"Klondike isn't supposed to eat the cupcakes until his sister's birthday party ... but can he wait that long?"--

While Nana fixes their sailboat, which will take them out to sea where the seals live, Noah builds his very own seal friend on shore until a storm blows in and he must take cover.

Lorelei is shocked to learn that her favorite animal, seals, actually eat penguins, so she sets out to do some in-person research--and discovers that in nature things are complicated.

"Skipper the seal heads to Navy SEAL training and learns ten life lessons (based on the precepts of Make Your Bed: Little Things That Can Change Your Life...And Maybe the World) from his instructors and with friends"--

Selkie Bay is a place where the old legends seem very near, and eleven-year-old Cordelia believes that her secretive mother is a selkie who has returned to the sea--a belief that offers some hope as she struggles to care for her two younger sisters and help her scientist father makes ends meet in their home by the sea.