Taking place between the first two musicals, Edgeworth has been wandering the world for several years, trying to find a new reason for practicing law. As he boards a flight to visit his hometown in California, he runs into hopeless loser and wannabe ladies man Larry Butz. After both fall asleep on the plane, they wake up to discover they are somehow in the past, when Gregory Edgeworth, Miles' father, was still alive. Miles soon finds himself embroiled in a murder investigation involving a woman named Alison Teresa, and is deterimined to unravel what happened, even if it means prosecuting against his own father.

In the midst of Sweden's rise to power, King Gustav III was the "darling of the rococo" who brought to flower the gorgeous Nordic culture. Set in the turbulent 18th century Europe, where power and intrigue swirled around him, this musical depicts his love, friendship, and courageous battle for his beliefs on a grand scale, involving a variety of characters.