Esperanza is The head cheerleader of las catrinas, a group of day of the dead cheerleaders who take care of sick children. They are very strict and mean, they only show love towards the children. This takes place in a city apocalypse, after the energy drink overcharge, accidentally (or maybe purposely) made the drinker turn into a zombie like mutant that wants to kill. Fizzco is the brand that created the drink. They have set up invisible walls that surround sunset city. If you touch it you die.