For the French-Spanish filmmaker Oliver Laxe, a competition berth in Cannes has been a long time coming. Laxe was here in 2010 (You All Are Captains), 2016 (Mimosas), and 2019 (Fire Will Come) without once going home empty-handed, and he now rises to the occasion with Sirat, his grandest, most adventurous work yet: the kind of bold, auteurist arrival that seems to happen more here than any other festival. The story takes place in Morocco, which provided the backdrop of Laxe’s first two films, and follows a father searching for his daughter amidst the dust and drugs of an illegal rave scene in and around the Atlas Mountains. There’s a delicious touch of Paul Schrader’s Hardcore to that setup, but Sirat is more in the lineage of William Friedkin’s Sorcerer, even Mad Max: a story about a ragtag group attempting to move some monstrous vehicles over a landscape...