An “accident” traps Liao Haoxuan in a sealed basement, with only an unconscious child and a walkie-talkie that cannot reach anyone for company. Someone has taken Zhu Xinxu’s ID card and tracking device, making her vanish as if following a script written in advance. Desperate, Liao Haoxuan follows clues on the dark web, only to discover that the betrayal comes not only from strangers, but also from the very “protection” he trusts most. With the child’s breathing counting down the seconds, he must rescue Zhu Xinxu from the trap before the truth comes to light.