Charlie Kincaid is a typical young teenager grappling with the usual challenges of growing up, but his life takes an unexpected turn when he stumbles upon a high-tech underground bunker hidden beneath his house. Charlie discovers that this secret headquarters belongs to none other than his father, Jack, who is living a double life as a world-saving superhero known as The Guard. Shocked and amazed by the sophisticated technology and gadgets, Charlie shares the discovery with his close group of friends, creating a thrilling sense of adventure. As they explore the extraordinary world that was hidden right beneath their feet, Charlie and his friends uncover the depth of Jack’s dual identity and the weighty responsibility he bears to protect the world from looming threats.

Meanwhile, a sinister force led by business mogul Ansel Argon threatens to upset the balance of peace and infiltrate the guarded secrets of the headquarters. As chaos ensues, Charlie finds himself caught in a web of intrigue and danger that pushes him to confront his feelings about his father’s secret life and his role in the unfolding events. The kids' curiosity turns into a high-stakes journey, forcing them to navigate unforeseen challenges and difficult decisions. Through teamwork and courage, they strive to safeguard their families and ensure that Jack's secret headquarters remains secure from those who wish to misuse its powers for nefarious purposes.