In an effort to boost ticket sales, Mateo brings on controversial rapper Lil Dini (guest star Kosine), who clashes with Take 3. Star and Noah confide in each other about their relationship issues and Simone is put in a sticky situation when Jackson is cast as her co-star in a movie. Meanwhile, Derek's keeping a secret, Cotton's suspicions about Cassie grow and Xander (guest star Chad Michael Murray) pushes Cassie to find the rat in her organization.