E-Eddie hires Gilles to track a wealthy client who suspects that his Second Ambit lover isn't who she appears to be. Gilles tracks her from online zeppelins to digital daycare facilities, discovering that his client's own wife is masquerading as his lover. Why? That's a harder problem.

While working on that bizarre case, Gilles also tries to figure out who killed his young friend, Five. This case takes him to the Event Horizon, where he uncovers information that brings even more real-world danger into his life.