Thinking that her stepmom (Lau) is gone for the weekend, 18-year-old Penelopé Garcia is hosting a party for her three best friends Mary, Laika and Khloe. The girls are enjoying themselves in the living room when Penelopé's stepmom suddenly come home and orders that the party ends here! Frustrated and humiliated, Penelopé apologizes to her friends, but one of them come up with an idea to grab, pacify and gag Lau with duct tape and then stash her in the other room so the party can continue!

Penelopé and the others love the idea and agree to it. So when Lau comes back to once again tell the girls to leave, she is grabbed with a handgag and tag-teamed by the 4 girls tying her up and gagging her with panties and duct tape. Lau is extremely upset for being treated this way by her own stepdaughter and her bratty friends. She squirms, grunts and tries to resist, but the girls are too many. As the girl planned, they stash Lau in the nearby room, shut the door and goes out to go on with their party!

The girls take selfies, talk and having a good time while Lau, tied up in the nearby room, struggles so hard that she manage to escape her bondage! Penelopé and Mary goes to check if Lau is still securely bound, but as Penelopé and Mary enters, Mary is grabbed with a handgag by Lau who then command scared Penelopé to assist her to bind and gag Mary, and soon betray her other friends by luring them into the room too...