What are the particulars of the plan discussed by sir Andrew and lord Anthony

The plan is to meet at Hastings and help the Comte de Tournay escape from France.

_______________________________________________________________

“He wants you and Hastings to meet him at Calais,” said Sir Andrew, more quietly, “on the 2nd of next month. Let me see! that will be nextWednesday.”

“Yes.”

“It is, of course, the case of the Comte de Tournay, this time; a dangerous task, for the Comte, whose escape from his chateau, after he had been declared a ‘suspect’ by the Committee of Public Safety, was a masterpiece of the Scarlet Pimpernel’s ingenuity, is now under sentence of death. It will be rare sport to get HIM out of France, and you will have a narrow escape, if you get through at all. St. Just has actually gone to meet him–of course, no one suspects St. Just as yet; but after that . . . to get them both out of the country! I’faith, ‘twill be a tough job, and tax even the ingenuity of our chief."