The little gun was unlike anything Amai had ever encountered before. That was surprising. As an ex-covert agent trained in the lethal arts, she was familiar with virtually every firearm in existence. Not metal, not ceramic, but light and shiny. There were no moving parts and no lettering to indicate where or by whom it had been made. Oh, and deadly! The blue beam of light that it produced from the solid muzzle was like something from a low-grade movie, but incredibly deadly. It could kill, or burn through any material it encountered.
Even more disconcerting, the little weapon wasn't the only mystery she'd stumbled into during the past couple of months. In far away Wyoming where she'd spent the winter recovering from a bullet wound, she'd found another. Not as deadly. Actually something quite benign, but also something that shouldn't have been possible.
The unreasonableness of it nags at Amai until she's forced to investigate. She doesn't learn much, but just enough to show that something is wrong and to urge her to continue her search for answers. She also finds a clue that she decides to follow up, and as a result, she becomes allied with others with their own mystery. Their probing is what caused the deadly response, people trying to kill them with a weapon that shouldn't exist.
They fled, but Amai isn't scared off that easily. She regroups and follows up with an attack of her own. The attack reveals the possibility of something far more sinister than she would have ever considered possible.
Their attack has made Amai and her friends the subject of interest by both the government, including her former organization, and those they have discovered. The enemy is immersed in the population and spread around the world. Is there any chance the world can be saved from whatever scheme they have in place?