Noah is upset over leaving behind her boyfriend Dan and her friends, and is frustrated by the extremely lavish lifestyle William lives that she is now a part of.

Overheard criticizing the Leister family and their home on a call with her best friend, she immediately gets off on the wrong foot with her new step-brother, Nick.

Noah sucker punches Nick and they argue about their behavior and what their parents would think, but start to acknowledge their sexual tension.

She also meets Ronnie, recently released from jail, and his friend Tipo, who forcefully encourages Noah to drink a spiked alcoholic soda.

Nick takes her home and carries her to bed, where she dreams flashbacks of the abuse her mom and she received when she was a child by a man, (unseen to the audience but assumed to be her father.)

Nick notices Noah shut down in a panic attack, experiencing flashbacks of her abuse, and they leave in Lion's car with Jenna with Ronnie chasing after them on foot.

He misses his dad's company gala, disappointing him and Rafaela, but returns home that night and bonds with Noah over racing and his sister.

They kiss passionately while acknowledging that it's wrong as they're legally related and Noah is underage, but stop just before Rafaela walks in the room.

Nick returns home beat up after a fight with Ronnie and is dejected after seeing Dan enter Noah's room, but finds her asleep outside.

At a party, Nick's on-again, off-again girlfriend Anna locks Noah in a dark closet causing her to have another flashback and panic attack episode.

Nick gets the police involved and informs their parents, who make him promise to stop seeing Noah if they get her back.

Nick and Noah execute a skillful maneuver on a dock, giving the police officer the opportunity to shoot Jonás through the open car windows, killing him.

The film is based on the Wattpad story Culpa mía by Mercedes Ron, later expanded into a book trilogy published by Penguin Random House.

[7] According to Amazon Prime Video, the film reportedly attained the best opening three-day viewership figures for any non-English local original in the history of the service.

[8] Lucas Hill-Paul of Daily Express rated the film 2 out of 5 stars, considering that it might be "Prime Video's trashiest venture yet, but it at least arrives with a self-aware wink and two likable leads".

[9] John Serba of Decider.com gave My Fault a negative review, deeming it to be "an atrocious movie", with the characters being otherwise "insipid and rudimentary".