The Weakest Ink / Sales Forced As the Moon Goats prepare for the Beats n' the Heat Festival hosted by Mayor Davis, Sam gets a notification that their video for their song "Play For My Band" has gotten 100,000 viewers. To celebrate this, they go with their pinky promise to each get matching small wrist tattoos at the Tat Shack. As Luna books an appointment at 4:00 for the Moon Goats, she runs into Chunk who got his latest tattoo as he tells her about the experience of when he got his tattoos which is painful at first. With her fellow Moon Goats having gotten approval, Luna is weary of it causing Lincoln, Lynn, Lucy, Lana, and Leni to help her find a way to endure the pain that comes with receiving her tattoo. At Royal Woods Elementary School, Miss Allegra reveals to the school's science club that they will be selling scented candles in order to raise money to obtain a high-powered telescope called the Galacta-Tron 3000. Lisa does a terrible job selling her candles. Lincoln learns of her plight and enlists Leni and Lola to help Lisa learn how to be a better salesperson. Lincoln enlists Leni and Lola to help give Lisa their advice on how she can be a better salesperson complete with Leni doing some adjustments to one of Lincoln's convincing suits. After an attempt with Cheryl fails, Lisa uses the Brain Lobe Enhancement Helmet to expand the salesmanship section of the brain and enlarge it where she sells her candles to everyone and soon gets hooked on salesmanship much to the dismay of Todd.