A quest for the Holy Grail that's linked to a kidnapping takes the team to an island off Nova Scotia, where danger lurks in an ancient subterranean maze rigged with booby traps.

Following a direct order from the mysterious benefactor of Veritas, the team goes to Italy in order to buy some letters written by Leonardo Da Vinci to his most trusted friend. Looking to get a seat on a secret auction, Dr. Zond bumps into Cazimo, who is one of the highest ranking members of Dorna. Dorna is also looking to lay their hands on the letters in order to find the location of Da Vincis diary, containing plans for an extremely powerful energy source.