FEBRUARY 2022: Intelligence reports prompt a call to Matt Ross, ex-U. S. Army nuclear expert and sniper, to deal with the nuclear threat not only to the Ukrainian military and civilians, but also to the International Atomic Energy team at Chernobyl and his new friends in the Ukrainian drone-flying, tank-busting Aerorozvidka outfit. Along the way Ross picks up Ulf, a brindle Dutch Shepherd bomb detection dog, and finds himself in the middle of the Russian invasion trying to remember how to down an attack helicopter with a Stinger missile, destroy a tank with an Ukrainian Skif anti-tank missile and prevent the spread of radioactive debris across Europe.