The Katsuragi Household that runs a small store may appear serene. But as the younger son Minoru commits a murder on the street, the family is exposed to the public. Is there anybody that is behind this murder case?

Natsuko Kotani was born to be a swindler. Meanwhile, Tetsuko Ishida is Natsuko’s distant relative. Unlike Natsuko, Tetsuko is an attorney with an upright disposition. Whenever Natsuko makes trouble, Tetsuko is called to solve her troubles. Believing that Natsuko is using her, Tetsuko, with her boring life, begins to change.

Makoto Tanaka (Tadanobu Asano) is 40-years-old and has remarried. His wife is Nanae (Rena Tanaka) and they care for 2 daughters from Nanae’s prior marriage. Makoto tries to have an ordinary family. Nanae then becomes pregnant. Afterwards, things begin to change among the family members.

One day a puppy comes to the house of Akari, who has just turned twelve, and was trying hard to act strong after her mother suddenly fell ill. She immediately falls in love with the puppy and names it “Socks” after the paws which looked like they had white socks on. Akari was together with Socks day and night. However, as Akari grows up, her feelings and interest moves away from Socks. Year by year, their distance grows, which also leads to her physical distance as she moves to a far off city, and must leave Socks behind to a childhood friend.One day Akari remembers the 10 promises that she had made with Socks and her deceased mother…