Well, yeah, at least more than it needs another vampire story. The Cenacle Scroll takes a slightly different view of the Grail narrative than you might be used to. The story postulates that the historical vessel -- used by Christ to celebrate the Last Supper -- was essentially the first-century equivalent of a Howard Johnson's water tumbler.
This isn't meant to be disrespectful in any way. Jesus and the Apostles were, after all, wandering from town to town, and, according to most accounts, had just arrived in Jerusalem for the Passover celebration. I doubt they showed up at the public house for their celebratory meal with their own complete set of dinnerware. Like any of us when traveling, they would have availed themselves of the proprietor's utilitarian place settings; in this case, likely a collection of robust, unadorned, kiln-fired stoneware.
If it was a Passover meal (a position with which not all scholars agree; see
Where did it end up? Well, that's the stuff of which novels are born...
Conveniently, my take on the matter, The Cenacle Scroll, is available as a Kindle E-Book. And a couple of sample chapters are available here.