Two middle school students, a man and a woman, who did not know each other, met coincidentally in the infirmary, sending text messages on their mobile phones to complain about their lives and envy each other's lives. Unexpectedly, their respective mobile phones carried so much emotion that they became their totems and magical powers, and they really realized their "wishes" by exchanging their souls and putting them into each other's bodies. With the exchange of bodies, they not only face great tests from their families and schools, but also are able to observe their lives from an unprecedented perspective.