My son died two years ago. Last night, at 3:07 a.m., he called me and whispered: “Mama… let me in. I’m cold.”

My son died two years ago. Last night, at 3:07 a.m., he called me and whispered: “Mama… let me in. I’m cold.” At 3:07 in the morning, the sound of the phone woke me up. It wasn’t just any ringtone. I had saved that ring for only one person, the only name I still found painful to say out loud: Chuka, my son. I opened my eyes in the darkness and saw the blue glow of the cell phone on the nightstand. The screen was trembling, or perhaps it was my hand. “Chuka” I felt my chest close up like a rusted door. I sat there, motionless, my mouth dry. Chuka had died two years ago. I had organized the memorial service myself—a service without a body, because the sea does not return what it swallows. I was the one who hugged his photo until I ran out of tears. So… why was his name there, calling me in the middle of the night? I answered with a clumsy finger, as if the device were burning me. —”Hello?” A second of silence. And then, a deep, hoarse voice, so familiar it split my soul in two. —”Mama… open the door for me. It’s very cold out here.” The air caught in my throat. That voice… I had heard that voice thousands of times: when he was a child asking for more pap, when he was a young man telling me “don’t worry, Mama,” when he was an adult hugging me as if I were the one who needed protection. —”Chuka?” —I managed to whisper, and my own voice sounded foreign to me. But the call cut off abruptly. I sat there with the phone pressed to my ear, hearing nothing. A cold sweat ran down the back of my neck and down my spine. I got up without turning on the light and crossed the long hallway of my house—a mansion far too large for two women and one memory. I am Nneka Okonkwo, Nigerian, 64 years old, long-time widow, living on the outskirts of Lagos. After my son’s death, I thought I would finish my days in silence, with the echo of his footsteps haunting the rooms. But that night, the silence broke. I banged on my daughter-in-law’s bedroom door. —”Adanna! Adanna, open up!” The door swung open. Adanna Okoro, my daughter-in-law, appeared with messy hair and eyes swollen from sleep. —”What is it now, Mama?” I grabbed her arm, gasping. —”Chuka called me. He said… he said he’s at the door. That he’s cold.” Adanna frowned. —”You had another nightmare. Go back to bed, Mama.” And then, the doorbell rang. Long. Insistent. Adanna went rigid. —”No…” —she murmured—. “It can’t be.” She ran down the stairs. I followed. She pressed her eye to the peephole. And then she screamed with all her might. —”Don’t come back! Go away! He’s back… he’s back for revenge!” I pushed myself up and looked through the peephole. There was no one outside. I didn’t sleep that night. Three days later, the phone vibrated again. “Chuka” I answered, crying. —”Mama, it’s me. I’m alive. I’ll explain everything later. Tomorrow, at nine, come alone to the ‘Ojiji’ café in Surulere. And no matter what… do not tell Adanna.” The call ended. How could a son buried without a body be alive… and why did his own wife fear his return? The truth wasn’t just going to resurrect the dead… it was going to unmask a murderer.