Basically you're someone living in the futuristic city of Glass. This city is ruled by a totalitarian conglomerate of corporations. Gabriel Kruger rules this city and your job is to stop him and overthrow him to help the poor people living on the grid. You can choose to live off or on the grid. If you choose to live off the grid, you're a runner and sometimes a fugitive. Runners can do missions and deliveries. You're main mission is to stop Mr. Kruger. You also have to fight K-Sec (Kruger Sec). K-Sec are the authorities that are everywhere in Glass. You wear a beatLink, a device that lets you see a map of the city and use the beatLink for communication with other runners. Just watch out for bad guys and take them out. If you already know the game, then you don't have to read this info and you know what to do. If you don't know the game, watch mirror's Edge catalyst gameplay on YouTube and you'll see how the story goes.