Then, after Jak learns an enigmatic mechanic he's been helping is none other than Keira (with Errol wooing her), it's revealed she's been building a new Rift Rider that will bring her, Jak, Daxter and Samos back home. Meanwhile, Vin, an Underground agent tasked with maintaining the city's defenses, is killed, allowing the Metal Heads to launch an invasion. Jak intercepts Praxis and his men confronting Kor, an elderly man who acts as the Kid's guardian. Kor reveals that he is the true leader of the Metal Heads, as well as the creature responsible for bringing Jak and his friends into the future. After a brief battle, he kills the Baron and escapes. With his dying breath, the Baron entrusts the Precursor Stone to Jak so that he can save the city.