Jake Wolfe and his former IED-sniffing war dog hunt for a mysterious bomb-maker who is wreaking havoc among the Florida Keys.

The killer is not amused by their interference in his plans, and he soon adds Jake to his list of targets.

With the islands under constant attack and everybody a suspect, the chase is on in a race against time as the clock keeps ticking down toward a final heart-stopping conclusion.

Will Cody's trained nose be able to find the criminal in time, so Jake can stop his bombing spree before he detonates "the big one?"