Newlyweds Nana and Shota move into a condo. A residents meeting leads to a terrifying game of murder involving Nana and Shota.

The game started as a joke among the residents, but that night, the manager of the condo falls to his death from the rooftop. And a paper with the word "Manager" written on it is found on the bulletin board later.

Yamagiwa, whom Fujii wished dead, is murdered, and Fujii receives a threatening letter. A special residents meeting is held to discuss who sent the threatening letters. The residents start developing suspicions about each other.

The manager at Xinyi's work dies in an explosion caused by a gas leak. The residents argue about whether or not there really is a swap murder game going on.

Two residents are killed, and Nana and Shota are the first to find them. Nana suggests to all of them that they should tell the police about the murder game, but they disagree with her.

An actor is murdered, and Kusumi feels responsible for his death. Nana confides in Kusumi that the name on the paper that Kusumi drew was written by her.

The leg of a resident is found in a golf bag and the rest of the body is missing. One of the other neighbors reveals that she wrote the victim's name. Some residents decide to contact the police about the murder game.

When Nana is interviewed about Asao's elevator fall, she learns that the murder game has only been investigated by one detective and becomes concerned.

The person whose name is written by Tamiya is killed in front of Nana and Shota. Since Nana is the one who was supposed to kill this victim if there really is a swap murder game taking place, a lot of questions arise.

Shota and Kuroshima are locked up at Sanae's place because they noticed something strange about her place. Meanwhile, Nana learns that Shota is absent from work, and she visits Sanae to look for him.