Plot summary
Fisk offers Castle a chance at Dutton, the "kingpin" of Ryker's Island prison who Fisk believes organised the deal-gone-wrong which led to the deaths of Castle's family. Fisk admits that this will allow him to take control of the prison himself. Castle mortally wounds Dutton, who reveals that he organised the deal for a drug dealer called "the Blacksmith". Fisk then betrays Castle by releasing Dutton's supporters on him, but Castle slaughters them all. Realizing that Castle could be an asset against Fisk's competitors while the latter is imprisoned, Fisk arranges for Castle to escape the prison.
However, Castle warns Fisk that the next time he sees him, he will kill him. Nelson and Murdock agree to part ways, while Page continues her personal investigation of Castle. She confirms with the now former-chief medical examiner that in addition to the Castle family there was another victim of the massacre, an undercover cop; the deal and subsequent massacre were part of a sting operation. Murdock investigates a Hand facility called the Farm, where he is confronted by Nobu Yoshioka, whom he had previously killed.
Credits
Adapted from Wikipedia contributors, Daredevil season 2. HTML formatting and reference markers removed.