The Expendables are a group of elite mercenaries, armed with an intimidating array of skill and weaponry, making them the toughest, deadliest heroes the world has ever seen. They fight battles that no one else can and generally succeed regardless of the odds. However, when a new threat emerges, they may finally meet their match. The Expendables soon realize that their over-reliance on old methods and aging equipment has left them vulnerable. They must adapt, update their arsenal, and bring in some new, younger blood to help them confront these unprecedented challenges.