Following the path in the sewers leads the party directly into the Atomic Power Plant. While the party climbs the floor inside, they eventually com across a guard and easily defeats him. The party continues their climb and eventually reach the top that is protected by. So-Cho catches up to them, he tells them to leave the rest to him. He destroys the machinery blocking the doorway leading into the room at the cost of his own life, but before dying. He gives the party his headband.
The party enters the room and finds the plutonium within the cooling water, now the party can complete the Erase99 to neutralize Su-Zaku's force field. By taking the plutonium, the alarm is triggered and the party is force to battle Machine.
An atomic power plant or a nuclear power plant is a thermal power station in which the heat source is a nuclear reactor.