The movie follows the actions of "Noble Team", a UNSC special operations unit composed of elite supersoldiers known as Spartans. A new addition to the team, identified by the call sign Noble Six, has been added as a replacement. Noble Team's leader is Carter-A259, a no-nonsense soldier. His second-in-command, Catherine-B320 (referred to by other team members as "Kat"), has a bionic arm; together, Carter and Kat are the only remaining original members of Noble Team. The other current members include heavy weapons specialist and surviving Spartan-II Jorge-052, assault specialist Emile-A239, and marksman Jun-A266.
