Cuck

The film runs out of steam and becomes heavy-handed and ugly in parallel with Ronnie's gruesome descent.

Lambert's film makes its point by delving deeper into toxicity and committing to the most unattractive parts of itself.

Throughout, the narrative keeps arcing inevitably toward a predictable and tedious eruption of violence. But the way the movie ends isn't as powerful as where it begins: with one lost boy, adopted by wolves.

There are fascinating textures along the way, but the finale is relentlessly shocking, partly because it's so inevitable. It's also frighteningly recognisable, and surprisingly moving.