 Halo 5 : Guardians begins eight months later . Blue Team — consisting of four of the five remaining Spartans ( Master Chief , Fred @-@ 104 , Kelly @-@ 87 and Linda @-@ 58 ) , receives signals from Cortana indicating that she has survived her death by taking advantage of Forerunner AI technology . The Chief , disobeying direct orders , travels to the planet Genesis to reunite with her . A team of Spartans from a competing program , Fireteam Osiris , are dispatched to apprehend him . This journey takes them to several places around the galaxy , including the Elite homeworld of Sanghelios , where the Arbiter leads an offensive against the final remnants of the loyalist Covenant . As they travel , Osiris discover that Cortana is activating ancient Forerunner constructs — the eponymous Guardians — with which she plans to impose permanent galactic peace on pain of death . She holds the Master Chief 's team captive , and while Fireteam Osiris are able to rescue them , they are not able to stop Cortana from executing her plan , disabling most contemporary technology and bringing all remaining sentient species under her aegis . As the game ends , Blue Team , Fireteam Osiris and the Arbiter regroup to plan their resistance . 
