The two young women embrace their changing lives. Lynne and Marta's friendship began when they joined the Intermountain Ballet Company as corps de ballet dancers. Across three stories they celebrated each other's successes and supported each other when heartache reaches into their careers and beyond. Their lives continue to intersect as they share happy moments and tragedy, love and loss, joy and confusion. Will their relationship survive all that adult life throws their direction with hundreds of miles between them? Act 4 is the final book in The Ballet Series.