So many mysteries in the past. So many opportunities, as well. While Portals, Inc. uses historians to test its time travel devices, historians use Portals to test their theories.

Neyla believes the 17th century discovery of the dead Princes near the Bloody Tower will tell her who murdered the boys centuries before.

Thomas Ayliffe believes he can pull off the crime of the century-any century.

All three agendas collide in a story about crimes and criminals, past, present, and future.