A man is haunted by a woman, and a melody. He is a writer, and she is the ballerina he fell in love with 40 years ago after he saw her dance to a particular tune that, nearly half a century later, is wafting back into his mind by way of a dream. In writer/director Ben Chace's arresting "Sin Alas," we find the aging author Luis Vargas (Carlos Padrón) in Havana, Cuba, opening his newspaper to learn that the ballerina haunting his brain, Isabela Munoz (Yulisleyvís Rodrigues), has died. The news startles him into revisiting his buried past, and the bourgeois life he shed to pursue political revolution as a young man. Part mystery, part ghost tale, this seductive film draws inspiration less from film than from postmodern literature, specifically from the freely flowing writings of Jorge Luis Borges, the Argentine midcentury author of slippery tales including the stories in "Ficciones" and "Labyrinths.