1. Task collection :
-Step 1 : Go to the north side of the first floor of Chaolu Mansion, locate Mr. McCaw, and have a conversation with him. At this time, you need to prepare a "Melancholy" emotional gear as a precursor to the conversation.
2. Three-dimensional area exploration
-Step 2 : Go to the three-dimensional area on the 2nd floor on the southwest side and look for Mr. McCaw's brother. See the map for the specific location.
-Step 3 : After entering the three-dimensional area, collect the dream bubbles, then move to the opposite wall and continue exploring.
3.Interact with younger brother
-Step 4 : Talk to the younger brother at the designated location, and then you will face a battle. After defeating the younger brother, the younger brother in the photo will appear.
4. Looking for sister
-Step 5 : Go to the city sandbox, locate and find the sister's location (refer to the map).
-Step 6 : After submitting the "Sour Dream" brand gummy, the sister in the photo will also appear.
5. Complete the conversation
-Step 7 : Return to Mr. McCaw and submit all previous findings, including the brother’s photo and the sister’s photo, to complete the “Clock Trick” task.
Through the above steps, you can successfully unlock and complete Mr. McCaw's mission in Morning Dew Mansion in "Honkai Impact: Star Rail". I wish you a fruitful adventure on the Star Railroad!