Olympia, Anna Cathcart and Otis, Isaac Kragten, are partners at Odd Squad, a kid-led organization that uses math tricks and quirky gadgets to fix odd problems across town. After stopping a giant mouse from crashing the mayor’s cheese festival, they head over to Delivery Debbie, Ashley Botting, to help with a bizarre issue: Debbie’s feet have turned into snails. While they work on a solution, a new rival arrives in town who calls himself Weird Tom, Jack McBrayer. He proclaims that he’s a doer rather than a thinker and quickly “fixes” Debbie’s feet with a flashy hologram gadget. With swagger and speed, Weird Tom and his adult-staffed Weird Team win the town over, distributing free t-shirts and making quick, flashy fixes that push Odd Squad out of business and seize their headquarters. The mayor, Seán Cullen, watches as the new team takes center stage and the once-humane problem-solving approach of Odd Squad is overshadowed by immediacy and spectacle.
Olympia and Otis soon uncover that Weird Tom’s “fix” was superficial at best, masking deeper issues rather than solving them. They reconnect with Ms. O, Millie Davis, and Oona, Olivia Presti, and together they confirm their suspicions by interpreting a bar chart from an Oddometer, which reveals inconsistencies in Debbie’s condition and the town’s supposed triumph. Confronting Weird Tom, they learn he was expelled from Odd Squad for impulsiveness and that his entire takeover was a revenge scheme. He tries to publicly frame Olympia and Otis by releasing a deceptive video while the public is distracted, but Oona spots a critical clue: Weird Tom has not been managing the population size of the mysterious “Daves,” creatures that multiply to twice their number, and the Daves are dangerously close to breaking out of headquarters and threatening Earth itself. The stakes rise as the true threat becomes clear.
The team rallies: former agents Olive, Dalila Bela, Otto, Filip Geljo, and Oscar, Sean Michael Kyer, join the effort to retake the headquarters. Otis and Otto pull off a daring move, dancing through lasers to disable security cameras, while the others keep adults distracted with coffee and biscotti to secure the Half-inator. Just as they glimpse a path to stop the catastrophe, Weird Tom intercedes, threatening to derail the plan entirely. Ms. O stays calm under pressure and devises a bold strategy: zap all the Daves from space using a converted ice cream truck turned into a makeshift spacecraft. Weird Tom agrees to help by reinstating former Odd Squad agents around the world, restoring the franchise’s credibility as a force for good.
Aboard the ice cream truck, Otis, Olympia, Olive, and Otto head toward space, their journey punctuated by bursts from the Daves in pursuit. They fend off the creatures with music blasting from the vehicle’s speakers, and they manage to redirect the Half-inator’s beam by reflecting it off suited agents’ reflective gear. Oscar and Oona work together to capture the final Dave, marking the turning point of the crisis. With the Daves under control, the crew celebrates their victory in orbit, a quiet triumph shared among old friends and the renewed confidence of Odd Squad. The film closes with a trio of mid-credits scenes: Oscar reveals hidden features of the headquarters’ science lab to Oona, and the final moment hints at how the team keeps their wonders under wraps, ending with a button-press that signals the end of their latest adventure.
