1) The document is a final draft script that follows the protagonist Josh as he wakes up disoriented in a park and has flashbacks of being infected by a zombie named Harvey at a hospital. 2) Through a series of flashbacks and cuts between present and past, the script shows Josh running from and being chased by zombies after escaping the hospital as the infection takes hold of him. 3) By the end, Josh fully transforms into a zombie himself, falling to the ground and vomiting blood as the heartbeat sound effect plays, signaling his complete change in status from human to the undead.