Amid the chaos in the ruined Chernobyl Nuclear Station, Hours after a mysterious second explosion in the core of the Chernobyl Ruins a scavenger team known as Unit Kappa-7 infiltrates the Black Zone to recover a strange power core emitting quantum pulses. As they descend into the sub-reactor chambers, an enormous explosion tears through the lower complex. They run through hellish wreckage as rogue security drones and unstable fission waves tear the area apart. Security guards mistake them for saboteurs..