Nori visited her aunt's apartment by the sea for the first time. She found a postcard letter from her aunt's notebook by accident. It was from Mitsuko Miyoshi. She decided to visit the unknown woman's address.

Over the course of 24 hours, five characters will face dilemmas suffocating through another day in their dead end worlds. Their lives will intersect as the story builds to a tragic climax for some and liberation for others.

Kaede is fed up with routine chores at her workplace and the relationship with her boyfriend. Her mood brightens when Takuya, with whom she and her brother Ryuta were befriended in childhood, returns to her home town. After reuniting, the friends spend a great time together. But when Ryuta’s girlfriend Yuki gets pregnant, confessions are made that change their relationship.

The story of a teenage boy called Yu, who falls for Yoko, a girl he runs into while working as an upskirt photographer in an offshoot of the porn industry. His attempts to woo her are complicated by a spot of cross-dressing – which convinces Yoko that she is lesbian – dalliances with kung-fu and crime, and a constant struggle with Catholic guilt.

Reiko, who has retired from acting, now lives with Masao, an illustrator. Meanwhile, Mitto, a childhood friend and former idol, shows up at the studio of Tamade, a cameraman, bringing her pet Betta fish along. Mitto says she is planning a performance event in order to self-publish a novel. Reiko and Tamade, along with Masao, each become involved in Mitto’s event in their own way. The appearance of Mitto brings a subtle change to the future path the three of them will walk. This is the story of four people and a fish, intertwining their lives in unexpected ways.

The four actors gathered in the studio spent three days rehearsing their 30-page script. They were told they would perform onstage on the fourth day. The cast has yet to be decided. Although they are upset about being in a closed environment with their smartphones and watches ripped away, the four devote themselves to rehearsals in order to obtain the roles they want to play. A second-rate actor, an unpopular actor, a bad actor, and an actor who can no longer find satisfaction in acting as directed. Their no-turning-back situations are gradually brought to light during rehearsals, revealing the women’s respective natures. Their performances collide as they give all they’ve got for their acting careers in this space where there are no rules nor even a director or producer. The fourth day arrives. As the masked audience watches, will they be able to show their true natures as actors and deliver a successful stage performance?