Three couples are staying at a lakeside cottage with their children. They want them to prepare intensely for a prestigious high school's entrance exam with the help of a private tutor. One night, one of the wives confesses to her husband that she has killed his mistress.

Sachie Kitahara is a housewife and she has devoted her life to her family. Mako Goda is a wealthy woman who runs a business. They are both diagnosed with terminal illnesses and are told they only have a short time left to live. These two women from completely different walks of life meet at the hospital. They both feel emptiness in their lives. They happen to get a 12-year-old's written bucket list. Sachie Kitahara and Mako Goda decide to carry out the girl's wish list and they begin to feel happiness entering their lives.

The 300 million yen robbery (San Oku En Jiken), also known as the 300 million yen affair or incident,was the single largest heist in Japanese history at the time. It occurred on the morning of December 10, 1968, in Tokyo,Japan. Half a century later, the case remains unsolved. 7 years later,just before just before the statute of limitations, Sawatari, a journalist, found out about the mind behind the crime is Matsuda, a businessman currently living in America. He traveled to America and asked Matsuda for the truth. Matsuda told him a story of how he, a former police officer, became friends with Joe, a bad boy, and Rock, who is shy and sensitive. Matsuda's sister committed suicide after being raped, and Matsuda lost his job after he made a scene in the financial institute his sister used to work. Matsuda, Joe, and Rock decided to do something big in revenge, so they decided on robbing a cash carrier.