One evening, Hammer gives a ride to Christina, an attractive hitchhiker on a lonely country road, who has escaped from the nearby lunatic asylum. Thugs waylay them and force his car to crash. When Hammer returns to semi-consciousness, he hears Christina being tortured until she dies. Hammer, both for vengeance and in hopes that "something big" is behind it all, decides to pursue the case.

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.

Soon after thumbing a ride from a truck driver, Johnny McBride is badly burned and suffers from complete amnesia when the vehicle he’s riding in blows a tire and goes over an embankment in a fiery blaze. McBride later receives a tip from an acquaintance that a photo of him was placed prominently in the window of a photography studio in a town called Lyncastle, so Johnny immediately leaves for the burg in the hopes that something there will jog his memory.

Detective Mike Hammer's investigation of a murder puts him in the middle between warring jewel thieves.

Aoife Ni Bhraoin returns home to help her father Brendan ‘The Bear’ O’Briain in his recovery from a heart attack. During this time, Aoife faces the grief of her mother that she hasn’t dealt with until now. Aoife reacquaints with a group of rowers and this all-female team, who against the odds, take on a high stakes Naomhóg rowing competition.