Grandpa escaped from the nursing home! But when his daughter and grandson go looking for him, they encounter old people who have turned into zombies! How will the guilt-ridden boy face his zombie grandpa when his treacherous journey of zombie escape is intertwined with memories of his grandfather's illness and how they abandoned him?

In 2006, Detective Chang leads a police investigation into a murder committed in a public marketplace. Chang discovers the victim's father has ties to several other families with dead or missing members, and a grim espionage case buried for 50 years in Taiwan's past. Meanwhile, the kidnapped Mr. Hsu is interrogated by a mysterious mastermind. As the truth emerges, the embers of history become a deadly wildfire.