Lily Rosewood has lived with her grandmother since her dad’s death a year ago. She and Gram have always been close—Gram’s role as chair of their family’s luxury coat business has inspired Lily’s love of fashion, and Lily hopes to follow in Gram’s footsteps one day.

Then Gram dies suddenly, and Lily’s world is upended. Gram’s quarter of a billion dollar fortune is missing, and Lily has been banned from the manor she and Gram shared. But Gram has always loved games, and even in death, she still has a few tricks up her couture sleeve.

When Lily and three other seemingly random teens get letters from Gram sending them on a treasure hunt around Rosetown, they hope the fortune will be the reward. But they’re not the only ones hunting for Gram’s treasure, and soon the hunt becomes more dangerous than they ever could have imagined.