In the sprawling, neon-lit city of Tokyo,  Kaito, a talented musician with a rebellious streak, encounters  Aiko, a captivating singer with a voice that carries the weight of a thousand emotions.  Their paths cross at a local jazz club, their shared love for music forging an unexpected bond.  But their love is tested when they become entangled in a dangerous world of underground gambling and organized crime.  Together, they must navigate the treacherous underworld,  using their talents to expose the truth and find solace in the healing power of music.