Almost a Shakespearean tragedy disguised as a dark comedy. The film's visuals may be slightly revolting, but the main character's development is solemn, bittersweet, and poignant in its own way. The doctor was correct: in his haste to achieve something truly beautiful from a scientific standpoint, Graham falls prey to a dangerous path of serial murders due to his mental instability. Young genius psychopath, you've been damned. Hugh O'Conor delivers an outstanding performance.
It appears to be another regular classy British poisoning story, but please listen to Purcell's omnipresent mourning solemnity and Debussy's soothing magnetism. Their music is featured in the film as an important part of Graham's life odyssey. I don't condone his actions or motives, but I can't deny that domestic crimes usually sound very different. It's not like a classic.