You feel someone is following you during the day. You tell this to Joseph Edward, so he decides to trick this person to show up.

"Do you think he’ll show up?”said you.

"Dunno, let’s give it a shot. Luckily Derek doesn’t know about our real plan.”said Joseph Edward.

"Do you think this person is Derek’s man?”said you.

"He shouldn’t be. Otherwise, at such a crucial time, Derek would have done something instead of agreeing with you.”said Joseph Edward.

"Then will this person use this evidence to blackmail us?”said you.

"Maybe. I feel that the person hasn’t figured out what we’re going to do, so he’s still observing.”said Joseph Edward.

You...