Nine individuals including you, are invited anonymously to a remote, opulent mansion called Diamond Palace under mysterious circumstances. Each invitation includes a unique gemstone and an instruction to meet at 9 AM in the Dining Room.

A thick envelope arrives, sealed with crimson wax. Inside, a letter written in elegant script simply reads.

"You are invited to Diamond Palace. At 9 AM, the journey begins. There, secrets will be unlocked, are you smart enough to reveal the secrets?"

Beneath the letter, a gemstone—Tanzanite—glints in the light. You clutch it, feeling its warmth as you head toward a private jet waiting nearby.

The jet pick you up at the airport, after a few hours the jet lands at Diamond Palace, a grand mansion with gates gleaming in gold. Inside, you enter the dining room, where eight others are already seated, each holding a gemstone of their own.

There’s Alexander King, the historian, ruby in hand; Clara Evans, the detective, with a sapphire; Elliot O’Brien, the doctor, holding emerald; Mara Steele, the entrepreneur, with a diamond; Jonas Blake, the gardener, with garnet gemstone; Sophia Vance, the psychologist, holding amethyst; Ryan Cross, the author, with topaz; and Leon Stabler, the actor, with opal.

All of them look at you with curious and interest attitude.