María Juana had arrived at the San Cristóbal sugar mill on the outskirts of Havana when she was barely 12 years old. Now, at 32, her back bore the scars of 20 harvests under the merciless Caribbean sun, and her hands knew every furrow of that land soaked in other people’s sweat.

It was the year 1789, and Don Fernando de Alcántara y Morales ruled those lands with an iron-fist and a distant gaze, as if the bodies that worked his cane fields were nothing more than voiceless, nameless shadows.

Don Fernando had a lawful wife in Spain, Doña Catalina de Mendoza, who visited the island every three or four years and spent the rest of her time in Seville administering the revenues the plantation sent her.

In her absence, Don Fernando allowed himself certain liberties that his position granted him without question.

One of them was Yemayá, a young enslaved woman barely 17 years old, with skin dark as ebony and eyes that held the memory of Africa. Yemayá worked in the big house, cleaning the imported marble floors and serving at the table when Don Fernando received visits from the governor or other landowners.

One stormy night, when thunder shook the lime-plastered walls and the enslaved people took refuge in their rotting wooden barracks, Don Fernando summoned her to his room.

She had no choice. She never had.

Months later, Yemayá gave birth to a child with cinnamon-coloured skin, his father’s light eyes and his mother’s curly hair. The labour was difficult, attended by María Juana and two other women in a backroom of the barracks, far from the overseer’s eyes.

When the child was born, Yemayá looked at him with a mixture of love and terror. She knew that the child was living proof of her dishonour and of her master’s sin. She also knew that Don Fernando would never acknowledge him and that if Doña Catalina were to find out, the consequences would be fatal. Three days after giving birth, Yemayá died of fever.

Her body was buried in the slaves’ cemetery, without a cross or a name, beneath a ceiba tree that seemed to weep with the wind. María Juana took the child in her arms. She had no children of her own. She had lost them all too difficult labours or illnesses that carried children away like dry leaves.

This child, however, was strong. He cried loudly, nursed desperately, and clutched her finger with fierce determination. María Juana looked into his eyes and knew she could not abandon him – but she also knew that hiding him meant risking her life. She named him Tomás, in honour of her father, a slave who had died years earlier trying to escape into the inland mountains.

She kept him hidden in her barrack, wrapped in old rags, feeding him with the milk of another recently delivered enslaved woman who agreed to nurse him in exchange for María Juana covering part of her fieldwork. During the first months, Tomás scarcely left the shadows of the barrack. María Juana worked from dawn until dusk, cutting cane under a sun that burned the skin and made the blood boil.

Each night she returned with bleeding hands and an aching body, yet always found the strength to hold the child, sing him Yoruba songs she had learned from her own mother, and rock him until he slept. The overseer, a large and cruel man named Don Esteban, grew suspicious. He had heard rumours about Yemayá’s child – about the colour of his skin and the shape of his eyes.

One afternoon, while supervising the cane cutting, he approached María Juana and looked at her with contempt.

“They say you’re keeping something that doesn’t belong to you,” he said in a low voice. “They say you’re hiding the master’s bastard.”

María Juana lifted her gaze, the machete still in her hand, and looked him straight in the eyes.

“I don’t know what you’re talking about, Don Esteban. I have only my work and my prayers.”

The overseer spat on the ground and walked away, but María Juana knew the danger was real. That night she moved Tomás to another barrack, hiding him in the loft where broken tools and burlap sacks were kept. She convinced Rosa, an older woman who had lost all her children, to watch him during the day while she worked in the fields.

Rosa agreed, driven by compassion and by the memory of her own dead children. Tomás grew up in half-light, fed by hands trembling with fear and love. He learned not to cry during the day, to stay still when he heard footsteps, to breathe silently – as if he were just another shadow among shadows. María Juana taught him to pray, to speak Spanish words that might help him survive if he were ever discovered.

She told him stories of Africa, of ancestors who crossed the ocean in chains, of gods who lived in trees and rivers. The years passed. Tomás turned five, then seven, then nine. His skin remained light, his eyes green like Don Fernando’s. María Juana knew it would soon be impossible to hide him.

The boy wanted to go outside, to run and play with the other enslaved children who worked in the fields or kitchens, but she could not allow it. One glance was enough to reveal the truth. One word in the wrong ear would be enough for Don Esteban to drag him to the big house and throw him at Don Fernando’s feet.

And then what would happen? Would he be sold as a slave to another plantation? Killed to erase evidence of the master’s sin? Or simply ignored – condemned to a life of invisibility and contempt? María Juana had no answers, only fear. But she also had something stronger than fear: the determination to protect the child who had become her reason for staying alive.

Every night before sleeping, she held him close and whispered in his ear, “You are a child of this land, Tomás. No one can take that away from you. No one.”

And Tomás, with his green eyes full of questions he did not yet know how to ask, nodded in silence, trusting the words of the woman who smelled of sweat, earth and love.

The sugar mill continued to run like a merciless machine.