Dreams are achieved and losses are mourned in the fourth volume of the critically-acclaimed time-hopping saga. After traveling billions of years into the past, Nadia finally reunites with her mother and sister in the hidden city of Arcola. But the happy reunion is shortlived as the city's hatred of robots soon forces her to choose between Kevin and her family, all while a mysterious threat plots to tear the futuristic city apart. Collects TIME BEFORE TIME #19-23.