Storm Tide

A chill creeps up my back. I swear, when I walked into this shed half an hour ago, there were muddy footprints on the dock. They aren't there now. Alone for the first time on the island he calls home, Simon is looking forward to a day of swimming and slacking off. His sister Ellen only wants to make sure they get their chores done. Neither Simon nor Ellen is prepared for the mysterious and potentially dangerous visitor who brings with him an unexpected storm and a riddle that may lead to treasure. Simon and Ellen have to work together to solve the riddle before the stranger-or the weather-destroys their chances.