From the Steam Store page:
As a legendary thief, your next assignment lures you into a grand and lavish mansion. There you find a series of puzzle boxes, designed for an unknown purpose.

Suddenly, you realize that this is no ordinary building and that you are no longer in control of what is unfolding, and perhaps never were. What should have been a quick in-and-out, turns into your own harrowing struggle for freedom and answers.