During a tense gathering, a man reveals he knows secret information about a hidden group, prompting suspicion about whether the leader has leaked their secrets out of affection. To strengthen their defense, he initiates a zombie defense training session, teaching the group to target zombies' vulnerable acupoints to buy time in emergencies. Despite initial pain complaints, the group quickly learns the technique under his instruction. The episode ends with the group practicing the moves, but unease remains as they question how much their secret is compromised and what the next threat might be.