Ten years after the Battle of the Breach,[N 1] former Jaeger pilot Jake Pentecost – son of deceased Kaiju War hero Stacker Pentecost – makes a living by stealing and selling Jaeger parts on the black market in the Los Angeles area. After he tracks part of a disabled Jaeger’s power core to the secret workshop of fifteen years old Jaeger enthusiast Amara Namani, both are arrested by the Pan-Pacific Defense Corps after an altercation between Amara’s small, single-pilot Jaeger Scrapper and the Jaeger November Ajax. Jake’s adoptive sister and PPDC Secretary General Mako Mori gives Jake a choice between the prison or return to PPDC as an instructor with Amara as his recruit.
Upon arriving at a Shatterdome in China, Jake starts training Jaeger program cadets with his estranged former co-pilot Nate Lambert. Nate and Mako reveal to him that the Jaeger program is threatened by Shao Corporation’s drone program, which offers to mass-produce Kaiju-Jaeger hybrid drones developed by Liwen Shao and Dr. Newton Geiszler. Mako is due to deliver a final assessment to determine the authorization of the drones at a PPDC council meeting in Sydney, but is killed by rogue Jaeger Obsidian Fury before she can report. Her death prompts the PPDC council to authorize the drone program and order their immediate deployment. Moments before her death, Mako transmitted the location of a defunct Jaeger production facility in Siberia. Jake and Nate travel to the area in their own Jaeger, but Obsidian Fury destroys the complex and engages them in battle. Upon destroying its reactor, they find that Obsidian Fury was controlled by a Kaiju’s secondary brain, which testing shows was grown on Earth.