John and Angel are childhood sweethearts in Nigeria in the year 1750. Slave traders capture Angel while John is away delivering animals he has collected for zoos in Europe. Angel is taken to Lagos as a slave and sold to the shippers to take her to Cuba as a concubine for the slaves. When John hears of this, he sets out on a trip to Cuba to rescue Angel with the Duke of Barcelona’s help. There follows an adventure of his journey and exploits in Cuba and Florida. He eventually sets up an underground route in America’s colonies to help escaped slaves before he becomes the Duke of Barcelona.