It's Lauren's birthday and, to celebrate, she invites friends out to a club --including Spencer's sis, Stephanie.
In the meantime, Spencer moves some ugly piece of furniture out of Heidi's apartment and into the middle of Steph's living room. She's livid and he's like a mad little baby. He's an ungrateful little bee-yotch, and licks her out of the living room (aka his bedroom). She says she's done talking to him.
At S Bar, Audrina, Whitney, Lo dance the night away for Lauren's birthday. Stephanie shows up with a friend and Lo and Audrina are skeptical. They totally think that Stephanie is up to something and is not sincere. After a few drinks, Lauren tells Steph that she thinks Stephanie is "a really good person." The next day, Heidi finds out the Steph was at Lauren's party and is not happy. She tells Spencer, who freaks out.
Lauren and Brody meet for lunch and LC drops the Stephanie bomb on him. He, too, cautions her. When Steph gets home, Spencer confronts her. She says she thinks she can get everyone to be friends again, which Spence doesn't seem interested in. Stephanie cries that her brother needs to stop having enemies. The next day, Steph tells Lauren that Spencer was pissed, and Lauren feels bad that she's causing fights between them.
Stephanie pays Heidi a visit and Heidi rips into her for going to the party. She warns her that one day you can be Lauren's best friend and then the next day you're, well, Heidi.
PART II -- "Just Be Careful..."
Whitney's crazy boss barks out orders for the upcoming Fashion Week, and Whit makes a good impression by coming up with some innovative ideas. Lauren sulks at work without Whitney, who is busy living the high fashion life. Whit and Lauren meet at the gym and talk business. Lauren seems jealous.
Stephanie and Heidi have a girl's night out and run into Audrina, who's out with work friends. Heidi approaches Audrina and basically asks her to be friends again. Audrina looks really uncomfortable throughout the conversation, but says all the right things. Stephanie and Heidi go shopping for home decor and Heidi says she left some stuff at her old apartment and wants to call Audrina to maybe get it. Stephanie reports back to Lauren that Audrina and Heidi "are cool now." Lauren's miffed. When Audrina gets home from work Lauren tells her to be careful if she's considering reigniting her friendship with Heidi. Audrina says she has no intentions of being friends with Heidi again.
Lauren meets Whitney at her office for lunch, but winds up helping her with work. One of the big wigs says they could use Lauren's help at Fashion Week -- she's psyched.
Heidi stops by the apartment to pick up her stuff. She makes a quick exit in fear of Lauren's return. When LC gets home, Audrina tells her that Heidi came by. Lauren's pissed that Heidi came in and "made herself at home."
Next week -- more fighting!