In a world where memories are currency, Juno, a debt-collector, discovers a memory in her ledger she never sold—a moment of herself laughing in a garden she's never visited. She sets out to trace its origin, uncovering a conspiracy that threatens the very fabric of memory and identity.

Eira, a quiet librarian in the steampunk city of Verenthia, finds a love letter sealed with crimson wax, postmarked a century from now. The writer knows her secret fears, her favorite books, and even the mole behind her ear. As she deciphers the letter's cryptic clues, she uncovers a conspiracy involving the city's time-bending automaton post office—and a romance that defies the very fabric of reality.