Vance hires Justin as an intern at Vanguard after he leaves with Ethan (although Ethan's not in it so if you hate him it doesn't matter) to essentially fuck with Brian's head, and Brian decides he wants Justin back.

Justin's determined not to get sucked back into Brian's world, and it goes from there. There's angst, humour, hot sex, pretty much anything you could ask for.

That isn't a particularly good summary really, but I suck at them so it's the best I can do. Hope it's useful.