Fortitude is an eleven-year-old boy coping with the recent death of his beloved Aunt Netta. He accidentally runs into Gary the Griot while escaping the sadness of the church service. He receives a butterfly net and a bubble blower to collect joy from various stories across the universe. He takes on the responsibility of gathering positive emotions to share with his soon-to-be baby sibling.

Gary is an elderly, magical man who travels between worlds. He possesses the ability to open doors to the "In Between" space and acts as a guide to different planets. He plans to retire and seeks an apprentice to take over his duties of collecting and distributing joy.

Cornell is a student who consistently loses arguments over which superhero is the best. He decides to create an unbeatable hero for the final debate of the school year. He interviews different members of his family to gather ideas and ultimately designs an original character to impress a girl he likes.

Jamal is a young boy competing against his cousin to inherit a newly discovered property. He uses his knowledge of Motown music to soothe a deadly creature during a dangerous trial. He realizes that working alongside his estranged cousin is the only way to solve the mansion's puzzles.

Dre enters his late grandfather's estate hoping to win the property over his cousin. He faces a series of physical and mental challenges, including surviving an attack from a breathworm. He reconnects with Jamal as they navigate the anti-gravity room and other strange traps.

Jevon is a twelve-year-old baker who advanced to the final four of a local competition. He feels highly anxious about his baking skills and worries about his father's quiet reaction after Jevon came out as gay. He spends the afternoon in the kitchen with his family, where he accidentally creates a spicy version of a traditional peach cobbler.

Rodney is a young boy who accidentally kicks his soccer ball into a neighbor's yard, destroying her tulips. He receives a magical hoodie from the neighbor that transports him into space. He enters a high-speed galactic race as a "Sundasher" to locate his missing father.

Dylan is a nine-year-old boy coping with the death of his mother. He visits the museum with his sister and breaks down crying when an extinct dodo bird display reminds him of his loss. He eventually channels his feelings into writing free-verse poetry about his memories.

Wes is a young illustrator who deeply admires his grandfather's military past. He agrees to go on a flight in an old plane stored in his grandfather's garage. He learns how to steer the aircraft and realizes his artistic talents are equally worthy of admiration.

Des attends a Juice Box Squad concert hoping to look exactly like DJ Amplified. He feels humiliated and begins to cry when kids in the arena mock his outfit. He finds the courage to return to the concert floor and dance enthusiastically using moves his father taught him.

Keziah dreads leaving his home out of fear that he will fail to make new friends. He accidentally steps into a service elevator that transports him to a massive alien spaceship. He works with another child to solve complex puzzles and figure out why the ship malfunctioned.

CJ is a skateboarder recovering from an injury sustained while attempting a complex trick. He returns home to find his school and local parks closed due to the COVID-19 pandemic. He begins delivering food bank meals to his neighbors, gradually rebuilding his confidence to attempt a scary stairwell jump.

Malcolm is turning thirteen and prepares to announce their nonbinary identity at their birthday party. They design an outfit to wear for the event but hesitate to use the original suit-dress hybrid design. They rely on their grandmother for sewing adjustments and the courage to share their new pronouns.

Big Nanny is a supportive grandmother who taught her grandchild how to sew years ago. She secretly alters a birthday outfit to match the original design by adding a train to the suit jacket. She shares stories about her son's past to reassure her grandchild about coming out.

Kassius possesses a "Fuerza" ability to open portals to any location. He plays in a high-stakes football game but remains distracted by his plans to ask a girl to the Kwanzaa ball. He prepares a cake with "yes" and "no" sections and leads his crush to it using a series of clues.

Mikkel writes rap lyrics alongside his cousin to help heal their grieving community. He struggles to find the right words to address the recent string of neighborhood tragedies. He observes his mother dancing in the living room and uses the joyous moment as musical inspiration.

Brandon is a skilled rapper tasked with creating an uplifting song for his congregation. He nearly crumbles under the intense pressure of finding words to heal the mourning neighborhood. He dances to Earth, Wind, and Fire with his family to clear his mind and find the joy needed for the performance.

Jay performs as his school's pickle mascot and relies heavily on his best friend for help. He feels jealous and blindsided when a new student locates the missing costume and successfully asks his best friend to a dance. He attends the event with a different girl but makes sure to save a dance for his friend.

Mia is Jay's closest companion who helps him manage his chaotic life. She meets a new student in the locker room and agrees to attend a school dance with him. She maintains her loyalty to Jay even as her social circle expands.

Percival is an immigrant boy who tries to hide his accent and blend into American culture. He attempts to ignore a spirit creature that follows him and criticizes his loss of cultural habits. He eventually uses his connection to his roots to banish an evil spirit from his apartment building.

Miss Marabella is an adult neighbor who invites Percival into her home to feed him sweets. She disguises herself as a kind woman but is actually a soucouyant, an evil fire demon from Trinidad. She tricks Percival into weakening his protector so she can consume him.

Aunt Netta was a close friend of Fortitude's mother. She understood the young boy's struggles to sit still and regularly allowed him to assist her in the church kitchen. Her recent passing leaves a heavy sense of grief over the congregation.

Big Mac is the recently deceased grandfather of Jamal and Dre. He secretly owned a massive countryside mansion and an extraordinary spaceship. He designed a series of dangerous puzzles to force his fighting grandsons to cooperate.

Jevon's father is a quiet man who struggles to find the right words to say to his son. He initially remains silent when Jevon mentions his crush out of fear of saying something offensive. He enthusiastically tastes his son's accidental chili powder dessert.

G'Ma is an energetic older woman who moves quickly around the kitchen. She shares her personal history with Jevon, revealing that she had a girlfriend in college. She serves as a bridge between her son and grandson during a tense afternoon.

Ms. Wallace is a Brooklyn neighbor who keeps strange secrets inside her home. She hands Rodney a special hoodie and activates an expanding crystal that transports them both into outer space. She understands the urgent situation regarding Rodney's missing father.

Tabitha, who goes by T, is Dylan's protective older sister. She wears makeup that Dylan compares to dinosaur armor. She comforts her brother when he drops his postcard and suggests visiting their mother's grave to help him process his grief.

Roosevelt is Des's older brother who initially finds Des's outfit embarrassing. He takes Des out of the concert arena when the younger boy starts crying from the teasing. He later joins Des in dancing and asks him to teach him the moves.

The Jab is a needy devil creature that serves as a physical manifestation of Percival's heritage. It complains loudly in a Trinidadian dialect about Percival's Americanized behavior and food choices. It physically defends Percival from a fire demon attack in the middle of the night.