What is the plot of jak and daxter 2?

In "Jak and Daxter: The Precursor Legacy," Jak and his sidekick Daxter find themselves in a dystopian city called Haven City. After being captured by the oppressive Metal Heads, Jak gains the ability to transform into a more powerful version of himself, known as Dark Jak. The duo embarks on a mission to uncover the secrets of their world, confront the evil Baron Praxis, and ultimately battle against the Metal Heads while seeking to rescue their friend Krew. Throughout their journey, they navigate a mix of platforming challenges and combat, while unraveling the mysteries of the Precursors.