Image: Sucker Punch Productions / PlayStationNo screenshot of The Sister Betrayed yet. This one shows Kamiagata (Sucker Punch Productions / PlayStation).
The Sister Betrayed is Masako Tale 9 of 9, the final part of her storyline, set in Sago in Act 3. You storm an old clan fort with Masako to face the person behind her family's murder. It needs Wolves at the Gates done and rewards the Adachi Half Mask.
Part 9 of 10 in Masako's Tales
Part 31 of 66 in Tales of Tsushima
Fort KaminodakeFort Kaminodake guards the pass between Toyotama and Kamiagata at the southern edge of the north. You must take it from the Mongols in Wolves at the Gates to get your allies into Kamiagata.
Fort KikuchiFort Kikuchi is the Kamiagata fortress of Clan Kikuchi in Sago Prefecture. It matters for Lady Masako's storyline, which ends with you and Masako clearing it of the samurai who moved in after the invasion.
KamiagataKamiagata is the snowy northern region of Tsushima and the setting for Act 3. It is thinly settled and harsh, and it is where you chase Khotun Khan to his final stronghold at Port Izumi.Find Masako at Fort Kaminodake. She is praying and asking her ancestors to forgive what she is about to do. She has tracked the ringleader to the old Clan Kikuchi fort, whose emblem matches the marks on the plotters' notes. Ride with her to Fort Kikuchi, open the gate, and fight through two waves of warriors defending it. Then search the fort for Masako.
Meet Masako at Fort Kaminodake. Ride with her to Fort Kikuchi. Get the gate open. Beat the first group of warriors. Go with Masako and beat a second group. Find where Masako went.
The mastermind is Masako's older sister, Hana. Hana resented that Masako married into Clan Adachi while she was sent off to an abusive husband in the cold north, and she faked her own death on the night of the killings. She shows no remorse. Masako will not kill her and gives her a tanto instead, and Hana uses it on herself. Masako later gives her a funeral.
Charm of The Lost MindThe Charm of The Lost Mind is a minor Stealth charm in Ghost of Tsushima. Enemies who are hallucinating deal 50% more damage to other enemies. You get it by finishing The Sister Betrayed or Hidden in Snow.
Image: Sucker Punch Productions / PlayStationWolves at the Gates
Wolves at the Gates is the Act 3 tale where you team up with Yuna's hunter contacts to take Fort Kaminodake and reopen the roads into Toyotama. Finishing it lifts the travel lock from The Fate of Tsushima.
Image: Sucker Punch Productions / PlayStationHidden in Snow
Hidden in Snow is an Act 3 investigation tale in Sago Mill, Kamiagata. The village is oddly empty and its men are jumpy, and you dig into what they are hiding. It pays a Charm of the Lost Mind and 18 linen.
A Mother's Peace
A Mother's Peace is an unnumbered Masako tale in Act 1 where you help Lady Masako find and bury her two sons on Komoda Beach. It opens after The Husband from a peasant at the Golden Temple and rewards the Charm of Fortunate Return and 2 Silk.
The Conspirator
The Conspirator is Masako Tale 8 of 9, an Act 2 side tale in the Kushi Grasslands where Masako turns her suspicion on Junshin. It ends with a duel against Masako herself and rewards the Charm of Dual Destruction II and the Seasons of War Armor Dye.