This term CULES is performing "A Prior Engagement", a comedy of manners in the style of Wodehouse and Wilde.
Colin and Daphne are minor members of the aristocracy, arranged to be married by their parents without their permission. Both are equally put out by this and when Daphne and her family are invited to stay with Colin's family for the weekend, disaster ensues when the engagement ring is stolen and the wrong people fall in love!
How could such a shocking twist possibly resolve itself in about an hour of stage time?!