Commissario Guido Brunetti and his colleague Claudia Griffoni have promised to look into what appears to be a private family tragedy. Vittorio Fadalto worked for a company that measures the cleanliness of Venice's water supply, and he died in a mysterious motocycle accident. Bolstered by the research skills of secretary Signora Elettra Zorzi, Brunetti pieces together the tangled threads and realizes the threat they reveal to the health of the entire region. But justice in this case proves to be ambiguous, as Brunetti is reminded it can be when, seeking solace, he reads Aeschylus"s classic play The Eumenides.--,Back cover.