DARKLON has managed to get the best of DESTRO and is going forward on his sale of the stolen nuclear trigger device. But when COLONEL FAROUD, the potential buyer of the device, asks for proof that it works, Darklon is forced to make a drastic choice that may put everyone-G.I. JOE, COBRA and even Darklon himself-in mortal danger! The clock starts ticking in G.I. Joe: A Real American Hero #186!