On the first day in a post-apocalyptic setting, a man chooses to stay inside his fortified RV after realizing he was marked for attack while buying supplies. Five days later, a suspicious man claiming to be a delivery guy approaches, demanding entry with overpriced goods and threats. When the man refuses, the intruder violently tries to break in, drawing the attention of nearby zombies. The intruder is killed by the zombies before he can breach the RV. After ensuring safety, the man inspects the intruder’s phone and discovers a shocking secret, leaving his next move uncertain.