It follows a story of Darth Vader's secret apprentice and the missions he is sent by his master, to different planets to slaughter the rest of the remaining Jedi, including Shaak Ti. After these missions Vader betrays Starkiller and Starkiller (now with real name Galen Marek) becomes a Jedi under under the guidance of Jedi General named Rahm Kota. They both join the Rebel Alliance and then Galen secretly arrives to the Death Star I and duels Darth Vader. After defeating the sith lord Marek cross his force lightnings with Emperor Palpatine. Due to this, there was an great explosion and true Jedi Galen Marek dies.