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 rebellion. 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 black and enslaved. 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.