Reunion

Reunion is the seventh mission and the second one where you play as Blue Team in Halo 5: Guardians.

Plot
Blue Team must fight their way through Covenant and Promethean forces to retrieve Cortana.

Transcript
{Cutscene}

''The UNSC Infinity is floating through space. Three Pelicans are flying down its length.''
 * Laskey: There have five more events following Meridian. That's eleven colonies. I need a means to stop this. Now.

Scene shifts to the inside of the Infinity's bridge, Laskey and Locke walk towards a terminal that Dr. Halsey is studying.
 * Locke: The Warden confirmed Dr. Halsey's theory: Cortana is activating the Guardians.
 * Dr. Halsey: But not this one. Not yet. Sunaion. A pre-covenant religious site on Sanghelios.
 * Laskey: There's a Guardian on the Elite homeworld?
 * Palmer: If we get a team on the ground we can access that Guardian.
 * Laskey: Sanghelios is off limits. The brass want nothing to do with the Arbiter's war.