CJ (Eden Duncan-Smith) and Sebastian (Dante Chrichlow) are the smartest kids in their Bronx high school, and they’ve got the perfect experiment to win a pair of scholarships to M.I.T.: a time machine.

Any time travel movie that makes a bold reference to Back To The Future is all right in my book, but this one’s got an even twistier twist. It’s a time travel movie with a social conscience.

CJ’s brother Calvin (Astro) is one of the dozens of unarmed young black men who get murdered by the police every year. If you were a teenage girl with both a dead brother and the ability to move through time and space, wouldn’t you go back to save him?

But like their high school teacher tries to warn them, time travel has moral and ethical implications that are not just beyond their understanding, but beyond ours. Even the tiniest unintentional change can have unpredictable consequences.

Despite its science fiction premise, See You Yesterday feels very grounded thanks to its social relevance, its community in mourning, and the anger that simmers just below the surface. I really enjoyed this genre mashup, the in-your-faceness of reality interfacing with the fantasy. The world feels believable too – sure there are a surprising number of nawt nerds in one high school, but CJ and Sebastian are experimenting in grandpa’s garage, with grandma’s cheese and cracker snacks. The cast is uniformly strong, but Duncan-Smith is the inevitable stand-out.

It’s the grieving, though, that makes this film exceptional. I had no idea what I was in for when I put this movie on. I didn’t expect to be moved. I didn’t expect such powerful imagery. Plenty of sci-fi has a social agenda, but most have to be set in the dystopian future to make their point. This one is set today. Without ever saying it, the message is clear: if you’re poor, if you’re a minority, today IS your dystopia. But director Stefon Bristol leaves us with a shard of hope: the future is female. The future is black. The future may be a young kid working away in the garage next door. Please don’t shoot her.