When two actresses of the London stage in the 1890s die under circumstances suspiciously like those that killed three actresses ten years before, Andrew and Inspector Peter Wyatt fear for Andrew's actress mother.
A family outing to Camp Allegro during the Christmas holidays is overshadowed by a series of mysterious threats that soon escalate into dangerous and frightening events.
Shortly after fourteen-year-old Millicent meets an intriguing stage magician on board an ocean liner, the cruise is disrupted by a series of apparently impossible murders.
Jenny and her friends resolve to find out about the mysterious house hidden in the dunes on Fire Island after she finds an abandoned dog that seems to have belonged there.
Nancy, George, and Bess volunteer for some work at the River Heights Animal Protection Center only to find themselves looking for escaped circus tigers.