内容简介：
Billy, Mary, Marty and Janie are set for a summer filled with fun. One of the gang finds an old map of England. Then Maryas aunt, an archaeologist, sends them a stone gargoyle from London. It seems to be a weird coincidencea]that is, until the children find a golden key and a riddle inside a hidden compartment in the gargoyle, and they discover something that was hidden for hundreds of years.