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 short-lived, 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