Chuck, Nate, Blair, Serena and Lola team up to uncover what they think is an explosive secret between Diana and Jack. Meanwhile, Dan is offered a prestigious fellowship in Rome for the summer, but turns it down for his relationship with Blair. Dan tells Blair he loves her but she doesn't say it back. Nate and Lola team up with Gossip Girl to take back the site from Serena leaving her hopeless. Diana is seen to be running a high class brothel service. At the end of the episode Chuck finds out his father Bart Bass is still alive.