In western Kanagawa, a vast theme park recreating three cities that once reached the height of prosperity in world history is nearing completion. Set amid meticulously constructed artificial cities, this mystery follows a murder case that unsettles the boundary between reality and replica.

A murder in a meticulously replicated city unsettles the boundary between reality and illusion.

When the body of literary writer Ueno is found at his home, relationships surrounding his work The Last Love Letter emerge. This courtroom suspense novel explores the depths of women's psychology while tracing love, betrayal, and truths hidden in the past.

A courtroom suspense novel centered on women's psychology, tracing memories of love and betrayal.

Yagami, a shogi player who vanished from the professional world, returns to the Ryusho tournament to challenge his old rival, Taniyama. But his opponents die mysteriously one after another, and suspicion falls on Yagami as he advances by default. Through shogi writer Kaneda's investigation, this mystery explores murder and the ambitions of people living in the public and hidden worlds of shogi.

As a player returns to face his rival, opponents begin dying one by one.