The only reason Henrick agreed to the eerie voice was because he didn't have many options except for abandoning the trial.
That's right!
Earlier when he completed the three tasks in the trial, Henrick got a system notification from the trail master through the system.
'Ding,
Congratulations to the challenger for completing the three tasks in the trial with great numbers. As a result, the participant can leave the trial in the middle without any penalty; however, the reward will be minimized very much if the participant exits the trial without completing it in the middle.
After reading the system mission, Henrick felt it was a great option for him; however, Henrick is not the type to leave something in the middle without giving it a proper try.
So, he wanted to know more about the eerie voice and what was the deal he wanted to talk about.