In "My Fault: London," the English adaptation of Mercedes Ron's Spanish book "Culpa Mía" falls flat, offering insufficient modifications to the original content to render it tolerable. The narrative primarily features a controversial relationship between two non-blood related stepsiblings, presenting a problematic theme seen as a guilty pleasure to some viewers. Yet the questionable aspects of the story fail to resonate with the broader audience.

The directors, Charlotte Fassler and Dani Girdwood, better known as “Similar but Different”, show commendable talent in orchestrating action scenes but fail to redeem the conventional and problematic narrative that revolves around their lead characters, Noah (Asha Banks) and Nick (Matthew Broome).

The story trails behind Noah, who moves to London from Miami after her mother marries British billionaire William. As she navigates her new life, she unintentionally enters the treacherous world of Nick, her stepbrother, characterized by fast cars and fistfights. A series of twist and turns in their tumultuous existence eventually lead to a taboo sexual relationship between the two, causing immediate content discomfort for viewers.

The film’s scriptwriter, Melissa Osborne, has attempted to polish the regressive narrative with subtle humor and minor adjustments. Attempts at self-aware humor and small changes in the storyline fail to save the storyline from its fundamental flaws-relatively standard and cliche character development, along with plot evacuations that seem absurd and illogical.

Despite this, the film boasts some high points - breathtaking visuals and engaging action sequences, which deliver steady throbs of adrenaline. The performances of Banks and Broome, despite the uncomfortable narrative they navigate, are magnetic and captivating. Particularly noteworthy is Enva Lewis's refreshing presence as Jenna, Noah’s British friend and a potential pivot for a more immersive narrative.

Regardless, the remaining books in Ron's “Culpables” series, which await their English-language adaptations, don’t promise anything better, given the evident narrative issues. Irrespective of the film’s acceptance of the protagonists’ inappropriate relationship, there is little to encourage viewers to continue engaging with these flawed characters.