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Twelve-year-old David Hernandez secretly protects the city of Lemming as the masked vigilante Slash, using his grapplers, quick thinking, and incredible intelligence to stop everyday crime while trying to live a normal middle-school life. But when a mysterious flying villain known as The Hawk begins terrorizing the city, David is pushed beyond his limits. As he balances school, new friendships with Mike, Henry, and Sarah, and a dangerous partnership with Holland Industries, David learns that being a hero comes with sacrifice, responsibility, and difficult choices. Season 1 follows his transformation from a neighborhood vigilante into a true protector, ending with a climactic showdown that changes his life forever.