Petra and Maisie Everturn just want to run their family's tea shop, but when their explorer brother Jiordan goes missing while looking for an alchemycal artifact, none of them are safe.

The sisters must enlist the help of another explorer in order to find Jiordan or the artifact-before the mysterious alchemyst society finds them first.

However, when one of the sisters stumbles into the clutches of the most dangerous alchemyst in the city, the race to unravel the clues becomes desperate. And when they discover the truth about the artifact, their quest to infiltrate the alchemyst's secret society becomes a matter of life and death.