Ex-Navy SEAL Brendan O’Farrihy enrolls in kendo classes to investigate a Honolulu dojo acting as a front for a yakuza syndicate. Or at least that’s what Brendan’s client, Senator Harris, believes. Through his kendo instructor, the cocky, short-fused, gorgeous Kinosuke Yonekawa, Brendan learns the criminals who are supposedly using the senator’s son, Kenneth, to expand their activities into the US, seem to have severed any yakuza connections. The jaded, soul-scarred former soldier is captivated by the loyalty these gangsters show each other and the way they protect Ken like a tight military unit. Brendan wonders why the senator lied to him, and what the yakuza are shielding Ken from.

When Ken disappears, Brendan suspects foul play and decides to help the man he is falling for, Kinosuke, and his friends, find Ken. But when Kinosuke discovers Brendan has been on the senator’s payroll, all bets are off.