It is said that the Panama Canal will be the greatest feat of engineering in history. For Francisco, a local fisherman who resents the foreign powers clamoring for a slice of his country, nothing is more upsetting than the decision of his son, Omar, to work as a digger in the excavation zone. Ada Bunting is a bold 16-year-old from Barbados who arrives in Panama as a stowaway alongside thousands of other West Indians seeking work. When she sees Omar, who has collapsed after a grueling shift, she is the only one who rushes to his aid. John Oswald has dedicated his life to scientific research and has journeyed to Panama with the goal of eliminating malaria. But his wife, Marian, has fallen ill herself, and when he witnesses Ada’s bravery and compassion, he hires her on the spot as a caregiver. This fateful decision sets in motion a sweeping tale of ambition, loyalty and sacrifice.