Yoshi Miyamoto has lived in exile for ten years after a disagreement with his father brought great shame to the family. Upon receiving an urgent correspondence after so many years to return home, he does so eagerly, desperate for one last chance at redemption.
Jewel and Victor Braiden, twin siblings, have just inherited the illustrious club Penumbra, along with all its connections to a seedy criminal underworld. The siblings share responsibility for the club, with Jewel taking to the stage while her brother manages the darker leanings.
Blinded as a child, Jewel strives to maintain her independence to live life on her own terms, but her overprotective brother keeps her under lock and key.
On the night Yoshi returns to Seraph City, he finds himself pulled into Penumbra and treated to a session of Jewel's night songs and falls under her spell. A chance encounter backstage sets them down the path to an unlikely friendship and, in time, something far deeper.
When Yoshi is given his next assignment, he knows failure is not an option, and he is determined to prove himself worthy above all else... that is.... until he is faced with his next mark.