Jordan Buchanan is thrilled that her brother and best friend are tying the knot. The wedding is a lavish affair–for the marriage of Dylan Buchanan and Kate MacKenna is no ordinary occasion. It represents the joining of two family dynasties. The ceremony and reception proceed without a hitch–until a crasher appears claiming to be a MacKenna guest. The disheveled and eccentric professor of medieval history warns that there’s “bad blood” between the couple’s clans, stemming from an ancient feud that ori...