A tribute to the all-encompassing possibilities of a mother’s love, Chinonye Chukwu’s true story Till (B) is as much the journey of Mamie Till Mobley, splendidly played by Danielle Deadwyler, as that of her son Emmett Till, endearingly portrayed by Jalyn Hall. The film transcends many historical nonfiction conventions on the strength of Deadwyler’s brilliant embodiment of a woman experiencing hopelessness and empowerment in the wake of overpowering tragedy. Chukwu creates a handsome mid-1950s production design and a contemplative and convincing story with strong ensemble work across the board. Several narrative threads and characters could have used some fine tuning, but the overall effect is moving and motivational. Deadwyler is an undeniable discovery for those who may not know her as a household name in the movies, and she has contributed mightily to this gripping and emotional tale.