The hit comic book series "Good Boy" is collected here in Good Boy: Omnibus One, telling the story of former mercenary Flint Sparks, coming out of retirement for the bloodiest revenge mission every to grace the graphic novel page.

Flint Sparks and his human Jon, both former mercenaries, have settled down in quiet retirement from an industry where the job is supposed to be forever. But, unlike anyone before, they found a way out.

However, this new life, one filled with peace and tranquility, is not to be. In the dead of night, some of their former "colleagues" who disagree with their decision to retire, break into their home and murder Jon, leaving Flint alive in the bloody aftermath.

That was their first mistake.