You are cordially invited

A private celebration at the Sterling mansion

At 11:30 PM the lights go out. When they come back on, Victor Sterling is dead, the gates are locked, and the killer is one of you.

How the night runs

Lobby. Everyone joins with the code and picks a number. The number becomes your character. Read your secret card. Show nobody.
Act 1, the party. Socialise and chase your objective.
Act 2, the murder. Lights out. Victor disappears. The body is found.
Act 3, the investigation. Detectives interview everyone. Lying is allowed. Clues are scattered by the host.
The twist. Everyone had a motive.
The courtroom. Suspects defend themselves. Everyone votes on their phone. The game master reveals once every vote is in.
The reveal. The killer is unmasked. Detectives win if the room voted right. The killer wins if it didn't. Everyone else wins by completing their own objective.