It looks like science loving Delia Bean’s summer is going to be be pretty boring. Her friends are hanging out without her and taking her little brother to the pool might be all the excitement she's going to get. But a trip to visit her Uncle Lyndon is about to change all that. Uncle Lyndon is the curator of the Earth Time Museum—a place outside normal time where Earth's greatest wonders are displayed—and he's offered Delia a coveted internship at the museum. But to get the coolest job ever, she'll have to travel back and forth in time-and compete against five other candidates from all over time. It's going to take all their combined skills and knowledge to survive dinosaurs, tears in time, and a renegade time traveller whose schemes might just destroy the whole museum.