H ere is an entertaining, if very exhausting fantasy-caper about the fashion biz from Boots Riley, a madcap mile-a-minute melee of unadulterated ker-aziness. You might need a couple of ibuprofen and a lie-down afterwards. Demi Moore perhaps thought she was here getting a gamey starring role, comparable to her Oscar-nominated turn in the beauty-industry satire The Substance . In fact, the way the film is structured and edited, Moore is hardly more than a returning cameo, though a potent one.

Potent … Demi Moore as Christie Smith in I Love Boosters. Photograph: Neon/PA

She plays Christie Smith, a billionaire couture designer who has an office in a trendily designed city block which leans over at an experimental angle. Christie is the object of obsessive attention from “boosters”: supercool young outlaw women who, nettled by her arrogance, shoplift her clothes from upscale stores and sell them on at knockdown Robin Hood prices.…