Plot summary
Following the downfall of Wilson Fisk and the Russian mafia, and the disappearance of the Chinese and Yakuza, various gangs attempt to take control of Hell's Kitchen, including the Irish Mob and Cartels. When a group of Irish are gunned down by an apparent "army", the sole survivor, Elliot "Grotto" Grote, seeks out the firm of Nelson and Murdock for protection. Karen Page, Nelson and Murdock's assistant—who is struggling to manage their financial troubles given that the firm's clientele often cannot afford legal fees—takes the wounded Grotto to the hospital, while Franklin "Foggy" Nelson learns from the Dogs of Hell biker gang that a group of their own was murdered by the same "army" as the Irish.
Matt Murdock, as his secret vigilante persona Daredevil, investigates the cartels, who he learns had all of their high-power weapons stolen by a single man. At the hospital, Grotto and Page are attacked by this man and barely escape alive. Daredevil confronts the new vigilante in the rooftops near the hospital, and is shot in the head at point blank range.
Credits
Adapted from Wikipedia contributors, Daredevil season 2. HTML formatting and reference markers removed.