Doomsday Flame Ship

The greenhouse effect causes the earth's temperature to continue to rise, with outdoor temperatures consistently exceeding 60°C. After more than 170 years of war and attrition, the only nuclear-powered submarine left on Earth is the Belem Tower. And our protagonist is a member of this nuclear-powered submarine and an ordinary repairman. On the surface, his job is to be responsible for the maintenance of various mechanical and electronic equipment in the submarine, but in fact, he also shoulders a more arduous mission...