Thomas and the other gladers have already escaped from a terrible labyrinth, survived in the post-apocalyptic world and hid from the company POROK. They exist in a world where there is no cure for the virus that hit most of the world’s population. Some of the people of the Thomas team (in particular Min-Ho and Teresa) are for various reasons now in the hands of the POROK. And these tyrants can do anything with them. Therefore, the gladers need to return to them in the most dangerous place – The last city, a real deadly labyrinth, where not all survive. But only there you can find a solution to all problems and issues. Not all galleys will survive after this last mission.