QuillSparkle
Nicola "Nikki" Rivera never knew her father, as his name and identity was kept secret from her mother, Imelda, and her sister has only revealed one thing about him: he has a love of music, something Nikki has a passion for.
So when she enters a fight with her mother and family, Nikki runs away and learns that The late Diego de la Cruz claims to know a Rivera. So, Nikki needs his help finding her father. She enlists the help of Hector after trapping herself in the land of the dead and has to find her father before sunrise.
Or the AU where Hector and Imelda have a second kid, who gets cursed, meets Hector and needs him to get her to Diego, who may know her father's identity.