Mel Gibson literally spells out the plot.
We were close once, we started this whole Expendables thing together, but we had a falling out. Really?! No. REALLY? Sylvester Stallone is back with a gaggle of aging action heroes mixed with some less ancient action heroes for another gun toting, action adventure.
Barney and his team, known as “The Expendables”, come into conflict with ruthless arms dealer Conrad Stonebanks, the Expendables’ co-founder, who is determined to destroy the team.