The Babysitter follows the Helljumpers, Orbital Drop Shock Troopers who are sent behind enemy lines to perform an assassination. The Duel features the tale of an ancient Arbiter who refused to bow down to the Covenant religion. Branded a heretic, he must now face the consequences of his actions. The Package depicts a group of Spartans, including the Master Chief, who are deployed to infiltrate a Covenant flagship and retrieve a �package� in a secret operation. Origins shows Master Chief and Cortana stranded following the events of Halo 3, with Cortana summarizing the fall of the Forerunners, the defeat of the Flood, and the rise of humanity as well as the events of the Human-Covenant War.