From the publisher:
The Swallows only meant to sail within an estuary on a borrowed boat. They didn't mean to get stranded in the fog, lose their anchor in a storm, and be driven out into the North Sea. John is nearly swept overboard, their ship almost capsizes--and Susan really regrets not doing as their mother asked. And their father, Navy Commander Ted Walker, is due back from his posting in Hong Kong any time and they might miss seeing him.
