Mariela brings her step-daughter, Sofia, with her to work to start earning money cleaning houses. The first house they clean is actually the mansion of a science researcher. Sofia complains the entire time as her step-mother laughs at Sofia’s superficial suffering. When Sofia discovers that her step-mother doesn’t know as much about this researcher as she should and uses it as an opportunity to enter an area that’s restricted. Chaos ensues as things get out of hand in the mysterious scientist’s mansion