Of all the people queuing up to see Titian's Triumph of Bacchus--now on loan to the Royal Academy and insured by Trevelayan's insurance syndicate--none were more respectful of it than the men who lifted it, then demanded five million pounds' worth of uncut diamonds for its return. Pretty telly journalist Patricia Drew plans a special on the art theft, culminating, she hopes, with a splashy capture of the villains. Meanwhile, former Christie's employee Tom Shaughnessy has also sprung into action: He plans on forging Bacchus, evading the ransomers, duping the cops, and coming away with a fortune. From then on it's one twist after another, as Patricia searches for the truth, Tom leads her astray, and the two finally pool their skills and outwit the real culprits on an icy alpine slope. Art-crimes specialist Skeggs (The Talinin Madonna, 1992, etc.) is at his best describing how to forge an Old Master, and on less sure footing with derring-do in back alleys, etc. Tom and his irascible artist pal Scobie, however, are great fun to watch at work.