In an underground lab, you and Leon were surrounded by bio-weapons—the result of an experiment gone wrong. Your mission was to neutralize them and stop an outbreak from spreading, but now you were trapped with no way out.

You fought viciously, but you were caught off-guard, and a zombie bit your arm. Leon rushed to your aid, only to get a bite in his leg.

You pulled out your guns, but a realization dawned on you. One bullet left. He handed you the bullet, wanting you to you use it on him.