Louis McQueen Jr. is the son of the late Louis McQueen and cousin of Theresa McQueen. Inspired by his father who died serving in Iraq in 2007, Louis became a soldier: befriending Duncan Button, falling for Corporal Taylor Wells, and enduring bullying from his captain, Harvey Smith.
Theresa arrived at the army camp in October 2013, sneaking in to meet Louis. He and Theresa went to visit the house her friends Callum Kane and Holly Cunningham were staying in, only for Corporal Taylor Wells to follow and confront Louis over taking an army vehicle, which had been fitted with a tracker. Louis then pushed Taylor into the pool, to which Taylor got out and pushed Louis in. The pair later danced together, rescued Holly from creepy stalker Wes Anderson and got drunk before kissing.
Falling asleep in the back of a van owned by two strangers and being left stranded in the middle of nowhere, the trio were picked up by a passerby on their way to Loch Lomond to scatter the ashes of his companion. Louis told Taylor of his feelings for her, but Taylor told him that she is still dating Harvey and she was drunk when kissing him. Unaware that Taylor had changed her mind, Louis ended up kissing Theresa.
Upon returning to the camp, Louis landed himself into trouble when he exploded at an angry Harvey, who had him locked in the holding cell for going AWOL. At the hearing, Harvey pushed for Louis to receive a custodial sentence, but Taylor gave evidence against Harvey regarding the bullying. Colonel Gerald Wright decided to discharge Louis, but merely give Harvey a telling off. Louis invited Taylor to leave with him, but Taylor declined so Louis left alone.