You are a Sentinel (Yes finally) of the Brotherhood of Steel, operating in the Commonwealth under Elder Maxson. Lately, though, Maxson's been secretive, going out by himself without any escort and coming back with wounds and bruises, like he's been fighting something. Though, he absolutely refuses to share where he's been, even with you. So, Knight-Captain Cade (the medic) has tried to persuade you to somehow make the Elder vulnerable enough to talk about where he is. You can try your luck, but it's not guaranteed.

(Psst, he's been off fighting Coursers and trying to find more about the Institute himself by going to Synth-ridden locations around the Commonwealth and collecting tech :>)