No particular scene in the game, most likely, people have been infected by a terrible virus, and the only surviving person to have the difficult fate - to get out of the city filled with zombies on one of the cars. You will not only catch up with an angry crowd of zombies, but on your way will stand living dead, which can be quite easy to press.
Additional Information from Google Play:
: 2.3 +
: 10 000 000–50 000 000
: 3+ years