Signal to Noise is an urban fantasy novel by Canadian Mexican author Silvia Moreno-Garcia.

[1] Moreno-Garcia stated that she was inspired to write the novel based on her parents, who both worked at a radio station.

[2] In 2009, Mercedes "Meche" Vega returns to Mexico City to attend the funeral of her DJ father.

While there she reminisces about her life in the city in 1988 when she was fifteen and how she accidentally discovered, along with her best friends Sebastian and Daniela, that she could perform spells by listening to songs.

She invites her friends, Sebastián and Daniela to join her in casting spells to help them achieve their dreams.

Vicente is a radio announcer who is ever working on a book about the history of rock music.

At the party, Meche and Constantino dance, but Sebastián doesn't have the same luck with Isadora.

Sebastián escapes by running and casting a glamour spell that allows him to disguise himself as an old man.

He has dreams of moving to Puerto Vallarta and spending his days on the beach while finishing his book.

This ends up being a scam and Vicente loses all the money he and his wife had set aside for Meche to use for her university tuition.

Slowly, she starts to outpace Sebastián and Daniela in her usage of magic, which worries them.

While at the tutoring lesson, her teacher begins to caress her breast and makes an advance, stating that he knows how she looks at him.

She uses her magic to throw the shards of glass in his face, letting him know that if he returns to school, she will do much worse.

In an attempt to bring her parents back together, Meche looks for a specific album that will help cast a love spell.

Angry at him, Meche, forces Daniela to help her cast a spell that will hurt Sebastián.

Although she can't remember any of her old magic, she knows enough to be able to cast one quick spell with her knitting needles.

Meche threatens them until Sebastián pulls out the album that is her source of power and breaks it.