Still reeling from the death of one of their members, the group hears from the mysterious 'time agent' as Anna reveals her true history. Or has she, and everyone else, been manipulated to some grand skeem? And what are the 'Three-In-One' and what is their hideous plan that has snaked both backward and forward through time? Can our heroes stop them before their cataclysmic ritual is completed? Will anyone, or anything, possibly survive? The epic conclusion to this Strange Detective Mysteries adventure will leave no individual untouched. Part 4 of 4.