Mayday, Mayday! A rough storm has caused a boat to break loose and run aground on the rocks. Black, greasy oil is leaking from its 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 friends must figure out a way to contain the spill quickly before it can harm any harbor seals. -- Adapted from front book jacket flap.