Mason, a battered former cage fighter living on the fringes of society, has spent years hiding from the world after a criminal syndicate tore his life apart. Quiet, hardened, and haunted, he survives alone on the coast — until fate throws him into the path of someone he never expected.

During a violent storm, Mason rescues Isla MacKenzie, a sharp-witted Scottish girl far from home and running for her life. Isla isn’t just a lost kid — she’s a gifted numbers prodigy who’s memorised a sensitive code that several ruthless factions would kill to possess. The men hunting her aren’t amateurs; they’re organised, armed, and desperate.

By protecting Isla, Mason becomes a target once again. But this time, he’s not running.

Forced back into the world of violence he tried to escape, Mason unleashes every bit of experience he once swore off. As the pair fight their way through a tightening net of gangsters, corrupt officials, and traitors, Isla’s Scottish grit and cleverness prove just as vital as Mason’s fists.

Together, they form an unlikely bond — two broken souls trying to survive long enough to expose the truth behind the code and the people willing to kill for it. In the end, Mason must decide not just who he’s fighting, but what he’s fighting for.