"Rhodes to Perdition" is the ninth episode of season 5 on the show, Gossip Girl.
Similar to previous names in the TV series, the title of the episode references a work on literature.
They speak of a "Studio 54" party in honor of their grandmother and mother, CeCe Rhodes (Caroline Lagerfelt).
Serena and Max arrive at Blair's reflecting of their long, but fun, night.
Max asks her to hang out later but Serena says she needs to pick up a cake for her grandmother's party.
Rufus enters their Brooklyn loft to see Dan checking in on people who do not like his book under the name, "DanFan".
Charlie begs Max not to tell Lily (Kelly Rutherford) about their past together.
Charlie's mission is to keep Max away from Serena and Carol will deal with her mother, CeCe.
Carol shows up at Lily's penthouse asking CeCe to forgive her, saying that Charlie and her have made up.
Serena tells her about the plans they've made to bake CeCe's cake later in the day.
William van der Bilt visits Nate at the Spectator to see how things are going on his first day as editor-in-chief.
Nate tells his grandfather about how his employee came forward with a story about how his cousin, Tripp van der Bilt's wife is cheating on him.
Nate promises he won't run anything until he speaks with Tripp.
CeCe is taken aback and fumbles with her medication, hinting that she may be sicker than she's putting on, and Charlie helps her take some pills to calm her "blood pressure".
Chuck confesses to Blair that he left the engagement ring he bought her in front of Henry Weinstein's door and walked away.
Lily tells Carol how she knows that she made Charlie go under the fake name, Ivy Dickens.
Nate tells William that he plans to reveal that Maureen's affair is not true but his grandfather convinces him to do otherwise.
The Rhodes girls are celebrating before the party when Lily pulls CeCe away to look at photos.
CeCe supports Charlie's story and Serena tells Max to leave.