Three ghost-hunting high-schoolers visit the Moore House in Villisca, Iowa—the site of one of America’s most grisly unsolved mass murders. After their private tour is interrupted, the group sneaks back in at night, unaware of the otherworldly terror that awaits them.

Based on a true story, Scorpion is a high-octane drama about eccentric genius Walter O’Brien and his team of brilliant misfits who comprise the last line of defense against complex, high-tech threats of the modern age. As Homeland Security’s new think tank, O’Brien’s “Scorpion” team includes Toby Curtis, an expert behaviorist who can read anyone; Happy Quinn, a mechanical prodigy; and Sylvester Dodd, a statistics guru.