Angel would rather spend the day at her Nana's house rather than with Grindah, so he sets out to prove he is more fun. While Beats is left in charge of Kurupt FM, Grindah takes care of babysitting duties. Chabuddy G decides to take his t-shirt printing business to the next level and hires a warehouse for the manufacturing process. He then decides he needs to recruit some workers.
After unsuccessful attempts to source anything to smoke, the boys decide to take matters into their own hands. Meanwhile, Chabuddy G has printed all of his counterfeit designer t-shirts and is preparing to sell them at the local market. At the salon, Miche has difficulty containing her jealousy when her rival gains her hairdressing certificate - especially since Miche feels she has more natural talent.
Grindah and Steves' non-stop bender starts to grate on the rest of Kurupt FM. Meanwhile, Miche is thriving and sets her sights on a modelling career for her and Angel. Chabuddy takes Beats shopping for baby stuff. Tensions at the station reach breaking point when a rival radio station is discovered and the boys try to prevent Grindah spiraling out of control.
A reluctant Beats is left to deal with the escalating beef with Kold FM. With snitching definitely not an option, how will they take down their rivals? Miche has begun living vicariously through social media, while Grindah's plan to win her back is interrupted by some unwelcome guests. Roche goes back to work, and Steves decides to carry out some tests to see if baby Robyn truly is his reincarnated nan.
The beef with Kold FM kicks off when the boys discover threatening graffiti across the front of the station. With the station under siege, Beats decides reinforcements are needed and calls in Chabuddy to secure their boundaries. Meanwhile, Steves' plan to protect his inheritance money backfires. Also, Grindah volunteers on Angel's school trip but has to decide between the battle to win Miche back and the approaching Kold war.
Kurupt FM is back to normal after Grindah's return, until Steves shows up with a hostage from the rival station, Kold FM. Meanwhile, Angel auditions for her school play and Miche becomes fixated with her role as a "Mumager", and Chabuddy starts a new job in a shop - but struggles with the employee pecking order. Forced into dealing with a hostage situation, Grindah invites their rivals to a mafia style sit down in the local Italian restaurant.
The wedding is back on, and the Kurupt FM crew are out on the town for the stag party. Beats makes a rookie error when booking a stripper, Grindah gets cold feet, and Chabuddy finally has some good luck. Miche's classy karaoke hen do begins with a limo ride round Brentford but goes awry when her ban on penis accessories goes unheeded and the girls start demanding a stripper.
The big day has arrived - Kurupt FM's first daytime rave! But first there is a wedding to get out of the way. Will Miche get the perfect fairy-tale wedding she has always dreamed of? With Grindah as the groom, Beats as best man and Chabuddy providing the 'decor' what could go wrong?
Kurupt FM has been raided, and the boys have resorted to desperate measures to stay on the air. They attempt to raise money at a car boot sale to replace their seized equipment with the help of Chabuddy G, who has a new money-making scheme. Meanwhile, Miche gets some bad news from the council and Carol has a new love interest.
With the station back up and running, Kurupt FM decide to have a go at live streaming to widen their fan base. Craig introduces Beats to the world of higher education and there is trouble in paradise for Chabuddy. Miche is waiting for the right time to tell Grindah about the move but has a plan to make it easier on Angel.
The Kurupt FM lot decide to film a music video for Heart Monitor Riddem - which is set to be their big break - and enlist Chabuddy as director, but when his vision doesn't go to plan they are forced to improvise. The stakes have never been higher for Beats, while Miche and Roche travel to Essex to view a potential flat.
Grindah has developed a mysterious illness which flares up whenever Essex is mentioned - convinced it is asthma, he visits the doctor. Steves has an important visit from his probation officer and must disguise any signs of radio at Kurupt FM. The cracks start to show in Chabuddy and Carol's relationship as his side business gets him into trouble at work.
It's Grindah's birthday and Miche has planned a meal with the whole gang. Keen to prove they're not getting old and out of touch, the Kurupt boys plan an impromptu screening of their music video at a student party. Steves helps Chabuddy drown his sorrows and discovers his community service has some perks.
It's the end of Kurupt FM, and as Grindah bids farewell to Brentford, Beats has planned a final send-off before his big move. Miche has high expectations for her leaving do at the salon and Chabuddy starts up a new business venture. Steves reaps the benefits of his new gardening skills and gains a new flatmate.
Since the end of their pirate radio station, life has been quiet for the Kurupt FM boys, but everything is about to change. News reaches them that one of their songs has been used on a popular game show in Japan. They've made it. Their music is reaching hundreds of thousands of people. It's finally time for them to enjoy the fame and fortune that they've always known they deserved. Chabuddy G steps excitedly back into his management role as Grindah, Beats, Steves and Decoy begin their journey to international stardom - But is Japan really ready for Kurupt FM?