This guide shows the complete walkthrough of In the Depths, an Unexpected Reunion Achon Quest in Genshin Impact 2.6, which released on 30th March 2022.
Talk to Katheryne
Talk to Katheryne to start the quest.
Look for the miner who posted the commission at The Chasm
Go to the path leading to the Chasm as shown in the picture below. Enter the Chasm and go left. You will find the miner, Yuehui, near the waypoint.
Enter The Chasm Underground Mines
To enter the mine, first, you will need to complete the Surreptitious Seven-Star Seal Sundering world quest. Then, go to The Chasm’s Maw Waypoint. From there, go northeast and jump down the mine.
Go to the designated location to investigate
Now you will need to complete the Chasm Spelunkers, The Heavenly Stone’s Debris, and Perils in the Dark world quests. As you go into the deeper section of the underground mine for Perils in the Dark quest, In the Depths an Unexpected Reunion quest will be complete.