Kimiko has built her life around discipline, precision, and working alone. Every mission reinforces the same belief: trust yourself, control the variables, and never depend on someone else.

Then Master Osamu gives her an assignment that comes with something she never asked for: a partner.

Corey is capable, unconventional, and far too comfortable crossing the boundaries Kimiko has spent years building around herself. As their mission takes them across Tokyo and into a dangerous vertical infiltration, Kimiko discovers that accepting help may require more strength than refusing it.

Before she could move forward, Kimiko would have to learn that some boundaries are meant to be crossed.