Dib, as usual, was late when school got out. Which gave Gaz time to examine what Zim gave her earlier that day. She took it out of her bag and opened it. Her eyes widened. It was an invitation to a Halloween Party at Zim's house! But why? She and Zim weren't even friends.

Part of her wanted to show Dib the invitation, just to see what he'd do about it. But then what Zim whispered to her when he gave her the invite rang through her mind: "If you agree to come, then don't tell Dib." But if she didn't agree to come? Then what?

Gaz's thoughts were interrupted by Dib finally getting into the car with an extra spitball in his hair. Because he was late again, Gaz decided not to tell him about the extra spitball.

Halloween night...

Gaz dressed in a different outfit, only because the corset dress she was wearing earlier was choking her to death. She took out a regular black dress from her closet and then added an orange sash around the waist, because it's Halloween and she felt like dressing in those colors. She then put on black boots and put a black headband with an orange skull in her hair. After making sure that Dib was busy working on trying to find out about Zim's plan, Gaz snuck out of the house.

Zim's house...

All of the kids who were invited were here and accounted for, except Gaz. That didn't worry Zim though. Knowing her, she'll turn up sooner or later. After some last-minute checking, Zim announced to the whole party, "Okay, guys! Let's get this party started!" With that, he took out a bunch of six packs of beer and passed the bottles around. This caused the crowd to go wild. Everybody took a bottle and started swigging it down, and most people were already on their second bottle, when the base's alarm went off. Shoving his robo parents into their closet, Zim answered the door and happily saw that it was Gaz, the last guest to his party.

"Gaz! You made it!" he said as he ushered her inside. He closed the door behind Gaz and, just to make sure, locked it. Gaz smiled at Zim, looked around, and asked, "You were actually able to get beer?" Zim shook his head and replied, "I didn't get the beer. I made the beer."

Membrane house...

"DIBBY-WIBBY! ARE YOU READY TO GO TRICK-OR-TREATING?" cried Mrs. Membrane's annoying voice from downstairs. Dib groaned and shouted, "I'm not going trick-or-treating Mrs. Membrane and I don't want to!" Mrs. Membrane then stomped upstairs, burst through Dib's bedroom door and said in a polite voice, "Now Dibby-wibby, you know better than to call me Mrs. Membrane. And besides, Gazzy-dazzly left to go trick-or-treating earlier. Don't you want to go join her?" This caught Dib by surprise. "Gaz isn't going trick-or-treating." Mrs. Membrane nodded and countered, "Yes she did. Either that or some sort of party. I saw that she wasn't in her room but she left this."

Mrs. Membrane pulled out a piece of paper that had writing on it. Dib took it and stared at it in shock. It was an official invitation to a halloween party, at Zim's base! Tucking the invitation into his jacket, Dib grabbed a few alien-fighting equipment from off the walls of his room and said to Mrs. Membrane, "You know, maybe going trick-or-treating is actually a good idea after all." Then, he rushed out of the house, hoping that Gaz was okay.

Zim's house...

The beer was starting to take its toll on the party guests. Some were already passed out, while others were just standing there, letting the effects of the beer run through their veins. Although Zim offered Gaz a bottle plenty of times, Gaz was smart enough to refuse. Before she knew it, it was already eleven o'clock at night. Her curfew was at eleven thirty. So, she found Zim and explained to him about her curfew and that she should go now, thanks for inviting her to the party.

However, just as she was about to leave, Zim grabbed for her arms and threw her into a chair nearby. The chair reacted and tied her tight against it. Gaz struggled as best as she could, but stopped when Zim chuckled evilly and said, "You can't go yet. The party's just getting started..."