In Venice a boating accident leads to the discovery of a 400 year old text bearing the signature 'WS' & promising the truth about the ' Shakespeare mystery' That very night someone tries unsuccessfully to steal the precious document The discoverer Marquis Stefano Da Spiri decides to send a copy of the document to a specialist of the Bard in London for stylistic authentication As for the original he entrusts it to an old comrade in arms from WW2 Captain Francis Blake