On the first day of isolation, a man with weakened health suspects he has been marked as prey and chooses to stay hidden in his reinforced RV. After five days of vigilance, a suspicious delivery man approaches, claiming to bring overpriced goods and threatening to involve a gang if denied entry. The man witnesses the intruder’s clumsy attempt to break in, which ultimately draws nearby zombies. The delivery man is overpowered and killed by the zombies. When it’s safe, the man checks the corpse and discovers a shocking message on the dead intruder’s phone, raising new questions about who marked him and why.