The series Invasion follows the residents of a small Florida town as they try to survive and make sense of a mysterious alien invasion. Ray, a local sheriff, takes it upon himself to protect the town and help the survivors band together. With the help of a mysterious but powerful new ally, Agent Mars, Ray and the others must search for answers and find a way to survive the chaotic new world they find themselves in.
As the series progresses, the townspeople team up to investigate the mysterious invasion and the strange creatures responsible for it. Through this investigation, they discover dark secrets about the aliens and the government agencies that are controlling the invasion. They must also evade hostile forces, both human and alien, while trying to find a way to fight back and take back the town.
Throughout the series, the townspeople band together to fight off the aliens in a variety of ways, from sabotage to inventive weaponry. They are aided by unexpected allies, some from within the town and some from outside. The stakes get higher and higher as the series progresses and the townspeople put everything on the line to protect their home and their lives.