Whatever brought you to the casino, you certainly weren’t expecting opportunity to fall into your lap. Perhaps you were at the slot machines, perhaps at the High Fold tables, but you couldn’t help but overhear a Vyixian in a red coat and a hat whispering urgently to a heavily built human.
“Look,” she says, “I don’t know how it happened but when I went down there it was gone. I don’t know how, I don’t know when, I just know it’s gone.”
“That’s not possible,” says the Human who you recognise as Ace’s head of security, Seven Broad, “that Vault is impossible to get into unless you’re you, Ace, or the Doctor-”
“I know that, but it’s gone, and I’ve checked your cameras-”
“You’ve checked our cameras?”
“-and nobody leaves with it after the Doctor leaves. It’s gone – you have to look into this!”
“I don’t have to do nothin’, Nine,” says Broad, “Ace did that as a favour to you and we’ve got enough going on. You can hire a private investigator or something all you like, but this is your problem – yours and the Doctor’s.”
Broad walks away, and you see the Vyixian’s ears fold in defeat, but you’ve sensed the opportunity and for whatever reason you offer to investigate…