Zack wanted to get rid of the control of Shinra Corporation and rescue Cloud who was poisoned by Mako liquid.

But Claude was unconscious because of the deep poisoning.

Zack began to escape with Cloud on his back.

Shinra dispatched a large number of troops to pursue them.

At the border of Midgar, the two of them were surrounded by thousands of Shinra soldiers, but Zack hid Cloud in a cave in advance and escaped. He was one against many, and finally exhausted,

Killed by random gunfire.