A gangster was in trouble and he called his friend to ask for help. His friend was willing to lend him some help. He even mentioned that he is going to use his helicopter to get his friend out of town, but his friend said that it won't help since every cop is after him. At last, he mentioned that he can lend to his friend, but the brake is broken.
The gangster quickly took it and that is where the adventure began. The idea here is to get out of town. Of course, that would be impossible during your early tries. You will earn money based on how long you have traveled in the game.