When a vicious assault compels sixteen-year-old Mnemba to leave her village, she joins her cousin Tumelo as a tracker in his booming safari business. It doesn't take her long to become one of the best safari guides in Nazwimbe. Her work allows her to escape into a new world of wondrous creatures, and to avoid thinking about what happened at home.

When Mr. Harving arrives with his daughter Kara to research unicorns, Tumelo assigns Mnemba to them as a guide. The attraction between Mnemba and Kara is almost instant, but Kara is engaged to be married when she returns home. Venturing into the savanna alone, they uncover a plot by a gang of poachers to enslave the unicorns, harnessing their supernatural strength to build a railway. They must save the creatures Kara loves while struggling not to succumb to forbidden love themselves.