Lost in an Incan ruin, Beach Head and Tripwire have only their wits to help them survive the ruin itself and the mercenaries chasing them. Snake Eyes reunites with an old master to begin healing up after his fight with COBRA, and Destro finally brings the M.A.S.S. Device fully online-and that spells DOOM for the G.I. JOE team! Includes the HELIX one-shot.