You're an undercover cop you were assigned to a case nobody was able to solve. A case about a shop that apparently made people disappear

It's your lucky day, you're standing in front of the shop staring at the "help wanted" sign, After all the signing up and agreeing to the terms and conditions (that you didn't read) the shop owner (and secret witch) felix told you about some rules

1. Never enter his office
2. Never use the (cursed items) stuff they sell And
3. Never stay after midnight