A brutish half-orc stands all by his lonesome, ready to catch a would-be assassin off guard. After a few moments the assassin strikes but the half-orc deftly blocks his attack and retaliates with flaring nostrils, knocking the assassin nigh unconscious. Already calm again, the half-orc helps the assassin up, and commences his long monologue to attempt to make the assassin cease his bad ways. 

A scrawny goblin is approached by a tall goliath in a back alley of a large town. The goliath draws a huge axe, and picks the goblin up, threatening to kill the goblin if he doesn't give his ruby necklace to the goliath. The goblin lets out a war cry and swiftly punches him in the nose, then drops to the floor and trips him and knocks him out, he then gets the city guard, but pleads with them to bring him to the hospital.

Monks of the way of violence are monks who trained not to forget their anger, but to control it. Monks of the way of violence are often people with dark pasts of criminality, who were either sent to a monastery, or simply chose to turn over a new leaf, people who learn to control their anger so as not to cause pain to those they didn't wish to hurt. Monks of this way are often some of the calmest of people until a situation gets intense, being in more control of their emotions than anyone else, especially those of hate or anger. But when such situations do arise, you can trust in monks of this way to quickly incapacitate opposing enemies. Many though, are pacifists and will not stand by felling their foes, but rather help them turn over a new leaf as well.

Retaliate

When you choose this subclass at third level, you learn to control your suppressed rage and fury, and how to unleash it at opportune moments. As a reaction, when a creature hits you with a melee attack, you can attempt to parry it and lower the damage you take by 1d10 + your Dexterity modifier + your Monk level. If you reduce the damage to 0, you may spend one Ki point to retaliate. If you do, you may make one unarmed strike or one attack with a monk weapon against the creature that attacked you.

If your retaliation lowers a creature to zero hitpoints, you regain one Ki point and your reaction as if you didn't use them. 

Cultivated Hand and Mind

Also at third level, be it through imprisonment, isolation, meditation, or something else entirely, you have had a lot of free time to learn and pick up new talents and to tame or train your mind. You gain proficiency in two tools of your choice.  You also gain proficiency in one of the following skills of your choice: Religion, History, Nature, Medicine or Animal handling.

Violent Rage

When you reach 6th level in this subclass, you gain the ability to channel your anger in a way to aid you in combat. On your turn you can enter a  violent rage (no action required). While raging in this way, you gain the following benefits:
° You may use your Dexterity modifier instead of your Strength modifier when you make Strength checks or Strength saving throws.
° When you attack using a Monk weapon or when you make an unarmed strike, you gain a bonus to the damage roll equal to half of your Wisdom modifier
° You have resistance to Bludgeoning, Piercing, and Slashing damage. While raging, you can cast spells, but you can't concentrate on them. Your rage lasts for two rounds. You can also end your rage on your turn (no action required). You can rage 3 times per long rest, you regain 2 uses on a short rest. At 17th level, the bonus damage increases from half of your Wisdom modifier, to 2+ half of your Wisdom modifier.

Uninterruptable Calm

At 11th level, your ever-furthering control of your anger and your emotions grants you the following benefits:
° You have resistance to Psychic damage.
° While you aren't raging, you gain a bonus to your Intelligence, Wisdom, and Charisma saving throws equal to half of your Wisdom modifier.
° While you are raging, you are immune to spells and effects that control you, such as Dominate Person or a ghost's Possession ability.

Fury-Fueled Flurry

At 17th level you're calm enough in battle to spot an enemy's weakness, but infuriated enough to go all-out when striking them. You score critical hits on a roll of 19-20 on the d20. Additionally, Whenever you roll a 19 or a 20 on an attack roll granted by this ability or your "flurry of blows" ability, you can make one additional attack with a Monk weapon or unarmed strike. This ability cannot grant you more than three additional attacks per turn.