The Covered Bridge (5E)

From publisher blurb: The Covered Bridge is an adventure designed for a party of four to six characters of 4th to 6th level. Some four hundred years ago, a heroic knight by the name of Varral et-Casan was poisoned, foully murdered by someone very close to him. The horrendous betrayal left Sir Varral’s potent spirit unable to travel to its reward and find eternal rest. The characters are only the latest in a long line of the spectre’s victims.