Every slave plantation is a house of spies and intrigue. No slave walks a straight line or has a single story - deep within their hearts is betrayal and insurrection. But against whom? Hiram Walker is a man with a gift and a curse. He was born between worlds: his father a white plantation master, his mother a black slave. And, unbeknown even to himself, he was born with a special power. When he is sold to a new mistress as punishment for attempting escape, Hiram discovers her home is a secret hub of the underground railroad: a training ground for its agents. Hiram fast becomes a highly skilled agent, retrieving the enslaved from the most dangerous circumstances and gradually learning to harness his power - but betrayals lurk everywhere. And eventually Hiram must risk everything to return to his father's plantation and free the friends he left behind.