Luke and the main character are in the process of cooking steamed tangerine crabs. Exhausted and hungry, the MC slowly realizes that what they're making isn't her most memorable dish.
The scene changes to six hours earlier. Luke calls the MC and tells her that his limited edition Sherlock Holmes box, which contains trinkets from their shared childhood, has been stolen. The MC checks her phone and sees a message from Sphynx, a mysterious individual who tests the detectives of Stellis with riddles. No one has ever won against Sphynx, but Luke vows to be the first and prove his worth as a detective. Since Sphynx texted her as well, the MC takes this as a challenge for both of them to solve.