Cleo encounters Howleen and irks her enough to wish for Cleo to be turned into a nobody. Frankie and Twyla then try to find out on their own what is wrong with Howleen but are dismissed by her thanks to Whisp’s influence.
Frankie asks if Gigi knows anything, but Gigi sadly tells them that she cannot say anything due to the Lantern’s magic. Twyla then tells Frankie and Gigi that Howleen is beginning to not act like herself, and she senses something strange within the shadows. As days pass, some of the side-effects of the wishes begin to affect the school and cause problems such as Lagoona becoming obsessed with being freshwater, the obstacles of Die Trying becoming very dangerous, and Abbey’s ideas as president not being taken well by the school. Not wanting her new friend to leave, Frankie vows to help change Gigi’s life. Frankie then talks with Gigi about her life in the lantern and discovers that she’s lonely and will leave Monster High after the last wish is granted. Howleen then leaves her behind and is chastised by Cleo De Nile. Twyla politely turns her down, not comfortable with all the attention.
While enjoying her new popularity, Howleen offers to wish the same for Twyla. However, Whisp reminds her about the rules and Howleen uses her next wish to become popular. She summons Gigi, who is alarmed by Whisp and warns Howleen about the wishes. Watching from afar, Whisp uses this opportunity to take advantage of Howleen to wish for things more for herself. Before Howleen can congratulate herself, Gory Fangtell torments her in the bathroom and leaves her crying alone. Despite the argument earlier, Howleen took the advice to heart and uses some of her wishes to help her friends: Lagoona turns into a freshwater monster to convinced Gil Webber ’s parents to like her, Clawd Wolf along with Heath Burns and Manny Taur get casted on the show ‘Die Trying’ and Abbey becomes the new disembodied president. Later, back at Monster High, Draculaura helps Abbey Bominable run against Slo-Mo for Student Disembodied President while Frankie shows Gigi around the school. Howleen, however, takes it defensively and runs off with the lantern while annoyed at her sister's words. However, seeing Howleen excited about using her wishes, Clawdeen advises Howleen to take Gigi’s words seriously. The ghouls later arrive at the Maul to fang out as Gigi elaborates on Howleen’s twelve remaining wishes and warns her there is a ‘dark side’ to using them. The shadow genie sees the opportunity of another eclipse and follows the ghouls unseen.
As Gigi grants the wish, they disappear in a flash of light and unintentionally free Whisp. Howleen uses her first wish to wish the ghouls and herself out of detention. The pink genie introduces herself and explains that Howleen is her new finder and is granted thirteen wishes. As she moves away and cleans more of the attic, Howleen unknowingly eventually finds the lantern and releases Gigi. Frankie Stein, Clawdeen Wolf, Lagoona Blue, Draculaura and Ghoulia Yelps spot Howleen and attempt to stop her, however they are too late and are later punished to clean the school attic by Headless Headmistress Bloodgood. Howleen apologizes as they clean while Clawdeen tries to understand her little sister’s reasoning but is dismissed by Howleen quickly. Howleen Wolf, who no longer wants to be an outcast, plans to take more action as so far as to arrange her name in lights while her shadow friend, Twyla, protests against it. Everyone talks about the upcoming events for the year such as the upcoming occultation (eclipse) while expressing what they wish would happen throughout the new school year. Opening title to "Monster High 13 Wishes"Ī thousand years later to the present, Monster High welcomes back the students for the new scaremester. After a blinding light, Fawn wakes in the middle of the desert as the lantern is taken away to the next finder… Fawn then uses her last wish to pull the mirror, Whisp, and Gigi back into the lantern. After the eclipses pass, Whisp returns to being a shadow. Gigi successfully manages to break the spell over Fawn but shatters the mirror. Seeing Whisp about to use Fawn to make the last wish, Gigi forces herself to break the rules and free Fawn of Whisp’s power using Grimm’s Magic Mirror. While Gigi tries to prevent Fawn from making the wish, the eclipse arrives, and Whisp becomes real. While Fawn is unaware of the incoming danger, she is being influenced by Whisp to grant all power to the shadow genie. Inside the mysterious castle of a desert area, a genie named Gigi Grant is being chased by her shadow sister, Whisp, in order to gain her current finder's, Fawn, last wish. Frankie informs the audience of an eclipse in a faraway land.