Sumerian Pictures' new trailer for Josephine is a tense experience, teasing a chilling mystery around one question: What did Josephine (newcomer Mason Reeves) see happen in the park? Channing Tatum and Gemma Chan lead the film as parents of eight-year-old Josephine, who witnesses a crime in San Francisco's Golden Gate Park. "Not a tear-jerker but a nuanced family drama that's ripe in emotional intelligence and thought-provoking sequences, Josephine is a hard watch and a must-see," she writes in her Sundance round-up.