Millie, a director, discusses with her actors, Ian and Tom, how to interpret two famous historical figures from the nineteenth century. It's 1831; Charles Darwin is invited to travel with Robert Fitzroy into uncharted waters off the coast of South America aboard "The Beagle". Their five-year journey is fraught with philosophical and personal tensions. Fitzroy, a staunch Christian, has faith in the unquestionable authority of the Bible, while Darwin begins to explore a more radical vision, his theory of natural selection.