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InHonkai: Star Rail, players have the option to engage in various types of quests, including mainadventure quests,daily missions, and companion missions where they can assist supporting characters. One noteworthy mission is the “Old Foreman’s Treasure” quest, which requires the player to investigate thedisappearance of Fersman’s Vein Detectorand retrieve it.
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In this guide, we will provide a comprehensive walkthrough on how to commence this mission and apprehend the thief. So without further ado, let’s get started!
How To Start The Old Foreman’s Treasure Mission
The first part of Hook’s Companion Mission is Old Foreman’s Treasure, which becomes availableafter completing the Lying the Rustmission and unlocking theTrailblazeLevel 16. After which, Julian will message you. Respond to his message to accept the mission.
Once accepted, travel toBoulder Town in Jarilo-VIand speak to Julian. He expresses his concern for his boss, who has gone alone with her Diggertron to the Great Mine, and has refused to let anyone join her. He believes the situation is potentially hazardous and asks for your assistance.

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Finding Hook
Head toGreat Mineand follow the blue diamond-shaped indicator, which will guide you toHook. Interact with her, and soon a battle will begin withVagrantenemies. Defeat the foes, and Speak toFersman. Then, teleport toNatasha’s Clinicspace anchor inBoulder Town in Jarilo-VI, talk to Natasha, and ask about Fersman’s condition. Now, come out of the clinic, and speak to Hook about the stolen vein detector.
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Finding The Thief
Teleport to theVagrant Shelterspace anchor in the Great Mine and speak to Hook and Swetta near the tents. During the conversation, she reveals that after the conflicts in the mines, there were four people who were not there.
Upon speaking to all four individuals, you will automatically return to Swetta, who will summarize your findings and request that you select a suspect to accuse.The correct answer is Cook. Upon selecting him, you will find that he has left his tent. Follow Hook and witness the thief attempting to sell theFresman’s vein detectorto Sampo. Once confronted, Cook refuses to surrender the machine, and a battle ensues. Defeat him to retrieve the detector.

Next, proceed to Boulder Town and interact withBalawayto have the detector appraised. Finally, return to Fresman atNatasha’s Clinic and relay the events that occurred throughout your journey. This will bring the end of this quest, and you will get Trailblaze EXP x350,Stellar Jadex60, Adventure Log x6, Shield x200, and Credit x20000 as a reward.
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