The Hill family is also not calm internally.

Nicholas discovered that the safe had been opened by someone.

It was not pried open, but opened with a code, and confidential documents were taken.

Those are things he and Megan used to settle down and make a living, as well as a source of wealth.

Without these things, he can't even return to the lab.

Could it be Megan?

No.

He had an agreement with Megan that when opening the safe, he would use his own ...