The events of that night had been clarified.
On a cruise ship, unlike a hotel, surveillance is basically always on and it's only turned off before the dinner begins.
And it was off before the guests boarded.
The entire dinner, including the surveillance, was arranged by Chi Huan's management company, which is currently under the Clod-Summer Group. Lawrence is the Chairman of Clod-Summer Group, and if he wants to appoint anyone to any position, no one dares to defy him.
Before the surveillance was turned on, the person to be hypnotized snuck into the room arranged for Chi Huan, only staying temporarily for the night, for she wouldn't bother to inspect anything, and by the time she returned to her room, she was a bit drunk and dizzy and would fall asleep as soon as she hit the bed.
Plus, that glass of honey water—
It had a bit of a sedative added to it, nothing problematic on its own, but it had a mild sleeping aid effect that would make one fall asleep quickly after drinking it.