Havana, Cuba. 1954.
Mickey Flynn is an ex-Korean War vet turned merchant marine. He was born in the ghettos of Chicago and raised in an orphanage with his younger brother, Patrick. He was one of several young men who received an education from the nuns at St. Vincent's.
But he was also taught the "sweet science" by Father Tim, a Golden Gloves boxer and retired police officer who only knew one way to bring a troubled boy to manhood. Father Tim worked with his young charges, taught them how to jab and punch and throw a hook that seemed to come out of nowhere. When the young men left St. Vincent's (Our Lady of the Glass Jaw), they were changed, fit and ready to take on the troubles the encountered around the world, no matter where they found them.
Now Mick's in Havana, working on WIDE BERTHA, his ship. After surviving a fierce storm at sea, the last thing Mick and the crew need to do is get crossways with the Italian organized crime flooding Havana, but it doesn't take much to put him in the cross hairs of a vengeful mob boss working for Lucky Luciano.
Unable to get free of bad luck and unfortunate circumstance, Mick ends up in the ring in an illegal boxing match fighting a human killing machine.