When an old woman storms into the Rijks Museum demanding the return of her painting, archivist Ruth Braams cannot quell her curiosity. Ruth delves into the history of the piece of looted Nazi art and discovers an enigmatic picture with a disturbing wartime provenance. It also appears that the elderly Lydia is not the only claimant and, against strict bureau regulations, Ruth endeavours to help strengthen her case. Days later, Ruth begins to receive sinister anonymous threats, warning her to stay away from Lydia and the painting. As the threats escalate, Ruth realises that there must be far more to the painting's popularity, and she enters into a series of increasingly lethal adventures as she investigates the painting's secret symbolism ...A brilliant evocation of Amsterdam that combines fascinating historical detail with a cast of sharply realised characters - a fast-paced, finely crafted, riveting mystery.