James, Carlos, Logan and Kendall get the opportunity of a lifetime when they are asked to head to Los Angeles and form a singing group. Once they are in Los Angeles, they must figure out a way to make Gustavo Rocque and Rocque Records happy in order to become a singing sensation.

The record company CEO thinks adding a fifth band member will broaden Big Time Rush's appeal and sticks the guys with a self-proclaimed "bad boy" named Wayne Wayne, who tries to inject dissension and tension within the group. Ultimately, Gustavo and the guys secretly band together to get him booted out of the band, in a "bad boy-off". Meanwhile, Mrs. Knight gets persuaded that there's an axe maniac on the loose, and forces Katie to play with a girl named Molly, who is later found to be a con actress that's 20 years old and tries to pass herself off as an 11-year-old girl driving in a high speed chase with cops, using Mrs. Knight's rental car, trying to get a job in Hollywood.

The boys must impress a well-known blogger, Deke whose words can control their career. They are going to be spending a "Day with Deke" very soon, so Gustavo hires people to train the boys to have a good "Day with Deke". When the interview starts, 5 minutes later, Deke writes a bad review, and the boys must figure out how to change his mind about them for a good review before he posts it through a series of traps. Meanwhile, Gustavo gets a "Scuttlebutter" account and sends out a Scutbut that he hate Brussels, the capital of Belgium. (He meant to type that he hates Brussel Sprouts)