Time Before Time Vol. 4 TPDreams are achieved and losses are mourned in the fourthvolume 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 citys 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.