Sam Grant is tasked with the job of tracing the vendor of a painting that had come up for sale at a London auction room. Produced by a German Jewish artist who had perished in a Nazi concentration camp, the painting had been stolen from a schloss in Lower Saxony in World War Two. Then it had apparently vanished. Now it has surfaced 50 years later. So who had possessed it in those years? Grant has to find the answer for Gerda Hoffman, an attractive blonde. But the case turns out to be more dangerous and lifethreatening than he could have anticipated...