"In this fourth and final book, tween twins Cassie and Caitlyn Waters are excited to be returning to their hometown, San Antonio, on a class trip. But as they reach their destination, trouble finds them as quickly as a vision, and one of their friends soon disappears. Using their Sight and their street smarts to try and save the day, the twins also begin to see things they didnt expecta man in captivity who looks exactly like their fathers pictures. Could he really be alive? And can they use the clues they see to save him before its too late?"--Amazon.com.