Before their eventual team-up together with Scooby and the gang, optimistic and bright Daphne and whip-smart and analytical Velma are both mystery-solving adolescents who're close friends but have just met on the web - until now. Daphne has just transferred to Velma's faculty, Ridge Valley High, an institute with the latest gadgets. And while competition is fierce one of the students for a coveted internship at Bloom Innovative, Daphne and Velma dig all gadgets and tech to explore what's causing a number of their brightest students in faculty to disappear - only to emerge in a zombie-fied country.