ShellShock 2: Blood Trails is a sequel to ShellShock: Nam '67. The plot presented in the game begins with the action of landing a plane in the dense Cambodian jungle, on which there is an extremely dangerous chemical weapon "Whiteknight". The transported cargo was to be taken over by American special agents who, however, mysteriously disappeared in a tropical forest. One month after the mission begins, the only survivor of the escapade returns to the base. The behavior of the arriving soldier is extremely strange and shows signs of some disease, and perhaps the effect of a toxic substance found in the plane. The problem turns out to be much more serious than originally thought, and soon the infection spreads to other soldiers and military personnel, turning them into bloodthirsty monsters. Playing as Nate Walker, the younger brother of an infected soldier, we must find ourselves in this dangerous situation and find a way to stop this plague before it is too late.