Blaise, Dexter, James, Olly and Reese want to improve their stamina when it comes to performing, so K-Pop idol Shindong enrols them on a military style bootcamp in order to boost their fitness. The boys are put through their paces by former special services commander and presidential bodyguard Sergeant Choi Young Jae, but will the boys live up to his high standards? The band also have to perform their first ever ballad written by internationally renowned hitmaker Wayne Hector, who has penned number ones for some of the world's biggest bands. There's no choreography to learn, but can they master their vocals and impress the K-Pop creator Hee Jun Yoon? Meanwhile, Dexter is still dealing with a constant stream of negative feedback from the training team and ramps up his vocal training in order to crack the problem. As their K-Pop journey enters its final phase, the band receive video messages from their loved ones at home, but there's a shock in store as Hee Jun unveils a surprise evaluation and stamina test which challenges the band like never before.