On the first day of high school, friends Mônica, Cebola, Magali, Cascão and Milena don't take long to realize that things at school have been strange. When they discover that the Lemon Tree Museum will be auctioned, they decide to join in a mission to try to save it. As they investigate, they come across ancient and frightening secrets of the Limoeiro neighborhood and soon realize they may be dealing with a much bigger threat.
Ariana dreams of being a singer. Her boyfriend decides to sign them up for the school's cultural competition to present a musical show. In addition to her fears and insecurities, she will need to face a rival, who will do everything to disrupt their presentation.
Ariana always went unnoticed until she accidentally posted a video in which she declared her love for the most popular boy in school. Now his ex-girlfriend will do everything she can to ruin the romance and make her wish she could go back to being invisible.