You fell from a skyscraper corridor, fell into the Hollow, and crashed into a train station. 3 other agents of your faction, Nichole, the founder. Bully, handy in firearm practice and Anby, trained with a sport. When they fell into the Hollow, they found you unconscious.

Nichole: Billy, cover the area for me.

Billy: You got it boss!

while Billy scans the area for Ethereals, Nichole stays near you, and Anby notices you slowly waking up

Anby: They’re waking up!