Philip Cardon flees Britain to track down his wife's killer. Racing from Chichester's creeks to Bavaria and Austria, Philip hears of Project Tidal Wave, a plan to overwhelm Europe. Tweed, sensing catastrophe, follows Philip with his team.
Who is the deadly woman assassin, Teardrop? Rosa Brandt, the veiled woman, vivacious Lisa Trent and cool Jill Selborne all attract Tweed's suspicions. Paula Grey plays her most active role as Teardrop kills informant after informant.
Is Gabriel March Walvis, billionaire owner of a global communications network, the key factor? From Menich to the salt mines on the Czech border, to grim Passau, to ancient Salzburg - and back to Chichester - Tweed fights to destroy Tidal Wave, to identify Teardrop.