The Flanders Panel

The story of a mystery hidden in an art masterpiece, spanning from the 15th century to the present day. Julia, an art restorer in modern-day Madrid, cleans a fictional 15th-century Flemish masterwork called "A Game of Chess" before it goes to auction. She finds a hidden Latin inscription beneath the paint: "Quis Necavit Equitem" ("Who killed the knight?"), and thus begins the tale.