A young woman is brutally assaulted by gang members in the middle of Guatemala City. As usual, the authorities have no suspects or leads, leaving the girl to become one more victim in a society where thousands of women are assaulted every year. Jacobo, the victim's brother, along with Antonio, his best friend, decide in their frustration to extract some their kind of revenge.

A fantastic discovery gets out of hand when artisanal fisherman Nacho and his young nephew Pato accidentally catch a childlike mermaid in their net. Unsure whether to help her, sell her, or release her back into the ocean, the two of them, along with Pato's overprotective mother Magda, must decide what to do when a bit of magic invades their world.