Zheng He was a famous 15th century Chinese explorer and navigator who led seven voyages to Southeast Asia and East Africa. Samson Beaumont is a shy 13-year-old boy with special powers called a "Savvy" who suddenly finds himself transported onto Zheng He's ship. Samson spends five days sailing with Zheng He across the Pacific Ocean before being transported back home, where he tells his family about meeting the legendary explorer.