McDonald’s is one-upping Willy Wonka's golden ticket. The fast food giant is launching a new contest in Japan where the grand prize is an 18-karat gold Chicken McNugget, which weighs in at 50 grams (1.8 ounces) and is worth about $1500. The giveaway is part of a promotional campaign to introduce two new limited-edition dipping sauces: Fruit Curry and Creamy Cheese.

To enter the contest, which runs from June 8 to June 28, you have to follow McDonald’s Japan on Twitter, where you’ll be given clues that will help you find a mysterious “McNugget Thief.” You also have to be in Japan, as additional clues will be found in restaurants throughout the country. Contestants then have to tweet the thief’s identity and the exact restaurant location with the hashtag “#怪盗ナゲッツ,” which translates to “Mysterious Nugget Thief” in English.

One lucky participant will be selected to win the golden nugget, which will be inside of a five-piece box of Chicken McNuggets.

[h/t The Daily Meal]