Foggy has amorous designs on Nora Batty's niece Constance, and arranges an evening's sophisticated entertainment to woo her away from her fiance Gifford. Meanwhile, Gifford is on the trail of a mysterious flasher who is stalking the neighbourhood. When Compo arrives unannounced, he predictably wreaks havoc on the careful arrangements, and Gifford's inept attempts to capture the flasher (who isn't really a flasher at all) lead to mistaken identities and chaos all round, in true "Summer Wine" fashion.