Rescue of Kate O'Malley

The End of the Line takes place in Veil of Secrets, Chapter 15. It serves as the climax ending towards the story.

Prelude
After Kate is exonerated of all charges against her, she reveals to Your Character that she is pregnant with Tanner's child. Your Character gets a phone call in regards to that Jeff Duffy is the biological son of Pierce Sterling and Alanis Acousta. After the information is revealed, Duffy shoots Margaret Sterling, Tino, and Chief Walsh dead. He locks Your Character in the jail cell with the dead Margaret and Walsh and takes Kate away to kill her to end the line of the Sterlings where it first started. Your Character promises to rescue her no matter what while you hear Kate's screams.

Showdown
Grant calls Naomi and Flynn immediately after hearing the gunshots. The group laments on how Duffy played everyone like a fool and decides to rescue Kate. Naomi instructs Flynn to call all hospitals and get the EMTs to help. You have a choice to wear the protective gear to rescue Kate and tell the group that Duffy is heading to the port where a replica of the ship, "The Endurance" is ported to kill Kate, her unborn child, Pierce Sterling, and himself.

Naomi drives and warns the group that they should not go head on with Duffy and leave that to her. As soon as you and your group arrive, Duffy opens fire. The group is forced to take cover behind some buildings. Grant is injured while trying to take cover. Naomi orders Grant to immediately leave and get help. She later orders Your Character and Flynn to distract Duffy long enough to rescue Kate. Your Character takes cover behind the stern when Duffy fires at them but Naomi distracts him long enough to go to the gangway and get Kate.

Good-bye and Good Riddance
Your Character and Flynn are able to rescue Kate and find out Pierce is there as well. As you are about to escape, Duffy tries to kill everyone on the ship with a gun but Flynn and Your Character are able to disarm him. Duffy reveals that he rigged the ship with explosives and that no one is leaving alive. Your Character pleads with him to think of Kate's unborn child. Nikolai rescued him when he was an infant and held to that guilt but gave Duffy a second chance in life. Duffy should do the same to Kate's unborn child. Pierce pretends that he is on Duffy's side and begs him to allow him to become a father again and that Alanis was his true love. If Pierce had known that Duffy was his son, he would had loved him and found him.

Duffy leaves his guard down a bit and allows the group to leave but Pierce attacks him and says that Tanner and Bryce were his true sons but were killed by Duffy and Duffy will never be a Sterling provoking Duffy. Naomi incapacitate Duffy but the ship is on fire. Your Character orders Flynn to get Kate off the boat to safety. Your Character has the choice to let them burn on the boat or try to save one of them. If Your Character chooses to save Duffy, Pierce perishes and Duffy is incarcerated. If you choose to let them burn, they both die. Your Character reveal what happen to Naomi. Naomi is not surprised as "The Sterlings have everything in their life. But one thing they don't have is love." You hug everyone and ponder what will happen next.