As founder and CEO of one of the country’s largest IT companies, Kim Seon Ju is a name everyone knows. A true genius in his field, Seon Ju has everything in life going for him. But living at the top comes with its own set of challenges, and some would stop at nothing to bring him down. In this case, literally. Hunted down by an unknown killer, Seon Jui becomes the unfortunate victim of a senseless murder. But instead of leaving this life, Seon Ju’s spirit somehow takes up residence in his smartphone. Now trapped within his phone, Seon Ju might have spent an eternity there had Park In Seong not stumbled upon it. A down-and-out university graduate unable to find a job, In Seong, is shocked to find a phone inhabited by the spirit of Seon Ju. Taking advantage of the situation, Seon Ju does his best to convince In Seong to help him, a task which becomes much easier once he mentions the hefty reward he’s willing to give In Seong in exchange for his services. Taking on the role of temporary CEO, In Seong steps into Seon Ju’s shoes at the company, much to the chagrin of his secretary, Jung Se Yeon. Working together in secret, will the two be able to find those responsible for Seon Ju’s death?