Get ready for a showdown beneath Rome with the dreaded Sisters of Perpetual Darkness!
Archer & Armstrong have leapt one step ahead of the The Sect in their worldwide race to collect the fragments of the mythical Boon. But will the ninja nuns that protect the Vatican's archive of forbidden knowledge prevent Valiant's newest adventurers from acquiring the next clue they need to complete their quest? If they fail, the Boon's civilization-leveling powers might just end everything - again. So when another member of the Archer clan suddenly appears, will Archer & Armstrong walk into their latest melee with a new ally at their side - or a knife in the back?