Chuck, Sarah and Casey learn about a man called "Perseus" who is behind Fulcrum's plans to build their own Intersect. While Sarah and Casey are sent to find Perseus, Chuck and Agent Cole Barker are forced to stay in a safety bunker. When the mission takes a dangerous turn, their orders to stay out of harm's way go out the window. Meanwhile, Morgan tries to convince Anna that moving in with him would be a bad idea.

When Chuck expresses his feelings about his complicated relationship with Sarah, a heartless female agent named Alex Forrest is sent to evaluate Sarah's performance as Chuck's handler. Morgan, Jeff and Lester try to weasel their way into getting invited to Awesome's bachelor party.