Mystery writer Mickey Spillane tries to help Clyde Beatty deal with a plot to sabotage his circus.

After his best friend and war buddy is mysteriously gunned down, Mike Hammer will stop at nothing to settle the score for the man who sacrificed a limb to save his own life during combat. Along the way, Hammer rides a fine line between gumshoe and a one-man jury, staying two-steps ahead of the law—and trying not to get bumped off in the process.