What appears to be the dead body of an ordinary old man, turns out to be of royal lineage with an unusual connection to Henry. A familiar scar and radioactive poison point Henry and Jo to the man being an assassinated king in exile. Moreover, a half century earlier, Henry remembers performing an emergency, life-saving operation on a boy while on his honeymoon with Abigail. The boy turned out to be a prince of a tiny crumbling kingdom. Life came full circle as the boy grew up to be a king -- and now, the murder victim lying in Henry's morgue. The mystery deepens when other members of this royal family are poisoned and it is revealed that the king has an heir. Meanwhile, Abe continues to investigate his roots and discovers something amazing about his bloodline.

Henry and Jo examine the world of cyber-terrorism to track down a killer when a member of a secret hack-tivist group turns up dead. The investigation also puts Henry in jeopardy of having his own secret exposed. How far will he go to keep his mystery from being revealed? He must walk a fine line between judging if others' secrets are worth keeping in order to save himself or be ready to take off - again. Flashbacks to an 1865 London hospital revisit Henry's first wife, Nora, who is now in her 70s and threatening once again to reveal Henry's condition, with disastrous results. Abe remembers back to his activist days and offers Henry an important clue to his current case.