Your name is Mr. Locke Smith, a world-famous locksmith. There's no lock in the whole world that you can't crack, be it padlocks, knob locks, lever handle locks, combination locks, safes and vaults. Name it, for sure you can unlock it.
That's when a savant, Monsieur Lockheart, a man obsessed with making different kinds of lock, invited you to his headquarters. He's willing to offer his entire life savings to you if you manage to escape a very special place he built equipped with his unusual, yet cleverly made, locks.
You are blindfolded and transported to Monsieur Lockheart's extraordinary house of locks.
You removed your blindfold and smirked, the first lock he wants you to crack was a common door knob. Easy-peasy, or is it?