It's the late 19th century, and steam rules the world. Due to advances in technology, steam now powers airships, telecommunications, weaponry, and everything in between. It's truly an age of wonder – until aliens burst onto the scene, intent on invasion! Chaos descends on the once tranquil world, and as the situation reaches boiling point, President Abraham Lincoln forms S.T.E.A.M., a group of brave souls who are fuming and ready to fight back!