Elderly, unarmed, and extremely dangerous.

Ajay Andersen was the best hacker the NSA had ever hired. He sank corporations, toppled governments, and broke cryptography. All of it. Retirement hasn't slowed him down one bit, thank you very much.

When his granddaughters are threatened, he's going to need to step it up a notch. He'll hack biotech corporations and criminal enterprises. He'll brave the wilds of a Minnesota forest and dodge ubiquitous surveillance. Ajay will do anything to protect his family, but the more he digs, the more he dredges up the shadows of his own dangerous past.

He only needs to know one thing:

What makes his granddaughters so darn dangerous?