The well behind Evercare Clinic leads into Still Shore. Open its sealed chamber, try three Martial Arts (opens in a new tab) and defeat Heartseeker before returning to the main story.
Complete "Still Shore" Lost Chapter Quest.
Use Fire Arrows on the fire basins to light the tunnel. Continue through the corridors, defeat the enemies and drop through the opening in the floor. Step on the pressure plate in front of the large doors, then push them open.
In the hall with the Faceless, search beside the floor cushions near the stone steps. Collect both the Old Music Score and Nameless Jade Flute.
Stand on the raised stone platform facing the sealed gate. Perform Song of Longing there. The Faceless gather around you, adding enough weight to activate the platform and open the route.
In the treasure room, find the book on the low altar between the carved pillars. On PC, press F at Mysterious Book. Open a Martial Art (opens in a new tab) page and use the displayed practice command. Repeat until the quest counter reaches 3/3.
Leave through the adjacent door and inspect the memory scenes around the Faceless. Follow the path to the narrow gap between the rocks covered in red candles. Squeeze through it.
Climb toward the summit beyond the gap. Activate the Hero’s Tomb near the top before entering the arena.
Heartseeker
Her scythe sweeps cover a wide arc. In the second phase, use the arena’s tombstones as cover from her projectile attacks. Defeating her returns you to the book chamber.
Explore the Hidden Passage.
Give the flute back to Cheng Xin beside the door. Open the Heavy Gate, pass the waterfall and read the letter on the table.
Head to the Sound's Origin.
Continue upstairs toward the voice. Open the next door and speak with Doudou.
Leave the Underground Palace to let Doudou calm down.
Use the nearby ladder to return outside and give Doudou time to calm down.