The Balbuena family, consisting of Sebastián (father), Santi (15-year-old son), Sebas (11-year-old son), and Susana (10-year-old daughter), along with their neighbor Mari Carmen and her daughter Maria, are outside the neighborhood supermarket with their bicycles when a sudden storm hits. A very strong lightning bolt strikes them, and they all begin to fall into a black hole, traveling through time, which takes them to the Wild West of 1870. There, they get involved in exciting adventures with gunslingers and sheriffs, with Indians and soldiers, horses, saloons, and bison.