Kicking off a sneak preview of "Pacific Rim Uprising", the viewer learns that after the events described in the first part, years passed. During that time a lot has changed in the world. The smoke of battle has long been a donkey, and mankind has endeavoured to restore civilization. Kaiju were defeated, so the Rangers no longer work. Nobody to protect them. Despite this, there are people who believe that the lull to be feared much more than a giant monster, because it means that soon they may collapse the new attack. And if not lead Rangers into the desired shape, then humanity again will not be ready for battle.
Realizing this, countries are beginning to train new Rangers. During this time manages to grow up son of Pentecost. Robot operators no longer seem unusual and extraordinary. Rangers can be easily found on the street, but most of them never had combat experience. And when life is quiet and calm, suddenly opens another gap between the two dimensions. From it there are new Kaiju, able to destroy the entire human civilization.