Years ago, Barney Ross co-founded the Expendables with Conrad Stonebanks. After Stonebanks became an arms dealer, Ross was forced to kill him – or so he thought. Now, Stonebanks is back and he's on a mission to end the Expendables. Ross decides that the way to fight old blood is with new blood, so he assembles a team of younger, faster, more tech-savvy recruits. The battle to topple Stonebanks becomes a clash of old-school methods versus high-tech expertise.