Underneath the streets of New York City, five-year-old Little (Zhaila Farmer) and her mother (Celine Held) live among a community that has claimed long-abandoned subway tunnels as home. When the pair is forced to flee above ground into a cold winter night, mother and daughter are plunged into a challenging world of chaos and tragedy that makes their uncertain underground life seem idyllic by comparison. Deftly weaving escalating suspense with sharp bursts of humanity in a nocturnal urban tangle, TOPSIDE marks the feature-filmmaking debut of Logan George and Celine Held, and introduces astonishing first-time performer Zhaila Farmer in this affecting tale of the deep love and sacrifice rooted in the parent-child bond.