Summer on the coast of Maine can be an idyllic time. That is, until Wolfe and Baker are hired to find who tried to steal a mouse. What starts out as innocuous as a fireman saving a cat from a tree quickly morphs into something far deadlier. Johnson Laboratories is involved with genome editing on mice in an attempt to eradicate diseases including cancer. But it seems that somebody else has designs on the technology of altering traits within living organisms. Clay and his colorful group of cohorts must once again pull together to uncover the seething evil that threatens Port Essex and the world in a race against time.