This page of our guide to Ghost of Tsushima has a walkthrough for The Sister Betrayed quest.
How to unlock: Complete The Conspirator side quest.
Where to start: Fort Kaminodake
This story ends Masako's quest line.
You and Masako will go to the enemy camp. You have to eliminate all the opponents. Masako, consumed with revenge, will not spare anyone, even if someone starts running away.
After killing all the opponents, you will run to the top of the location. After more fighting, you will meet Masako's sister. Her death will ultimately end your companion's mission and revenge.
- Legend increased - smaller bonus;
- Lesser stealth charm;
- Adachi Clan Half-mask.