Jak X takes place one year after Jak 3. After the ending of Jak 3 Kras City was destroyed and being slowly rebuilt during this time combat racing became more popular sport. Once the game begins Jak and the crew listen to Krew's (villan from Jak 2) final will, they take a toast and find out they've been poisoned and the only way to get the antidote is to win the next Kras City Championship. The cup is hosted by G.T. Blitz who you later find out to be a suspicious character. Throughout the game the story unravels and the ending changes your thought on one character.