Kim Sun-Joo (Park Sung-Woong) is a developer and the founder and CEO of an IT company. One day, without knowing why, he is chased by someone who is trying to kill him. He gets stabbed by that person and as he senses death looming, he feels his spirit being sucked into his smartphone. His spirit then gets stuck in the smartphone. Park In-Sung (Chae Jong-Hyeop) is a diligent young man, who comes from a poor family background. He has been looking for a job ever since he graduated from a university, but it has been difficult. One day, while he is picking mushrooms on a mountain to make money, he discovers a strange smartphone. The smartphone contains Kim Sun-Joo's stuck spirit. The smartphone tells Park In-Sung "If you do me several favors, I will give you 10 billion won ($7 million USD)." The smartphone then shows him a bank account that has 10 billion won. Park In-Sung accepts the offer and follows the smartphone's instructions. The smartphone sends an email to his company, notifying them that Kim Sun-Joo is going on vacation and Park In-Sung will temporarily takeover his CEO duties. His secretary at the company is Jung Se-Yeon (Seo Eun-Su). Park In-Sung and Kim Sun-Joo now try to find the person responsible for stabbing him and the reason why.