"Balestra" follows disgraced competitive fencer Joanna Bathory (Tessa Thompson), who is desperately hoping for an Olympic comeback. Pressured by her husband and coach Rafe, she receives a prototype device allowing her to extend her training into her sleeping hours. By day she's on the piste, and by night she's lucid dreaming. But reality begins to blur when she encounters a stranger named Elliot (Marwan Kenzari) and gets caught in her own web of subconscious desires and unfulfilling reality.