The global atmosphere is enveloped by a highly toxic mercury vapor and humans have to wear masks to live. With time control superpowers you are sent to investigate whether the church is related to atmospheric pollution. Gun Fu is a lost ancient skill.The master of Gun Fu can control the surrounding time and let it flow slowly.Using the bullet time effect, the geometric distribution position of the enemy is analyzed and prejudged, and the order of planned attacks gives the opponent a fatal blow. The bullets are limited. You must use the interactive environment to kill the most threatening enemy, and this is the key to victory.