 It tells the tale of two boys, Woo-Soo Choi and Kang-Too Jee, after their souls are accidentally switched into one another's bodies.On the same day as a scientist is performing body teleportation experiments, Woo-Soo Choi and Kang Too-Jee end up in a fight after Woo-Soo Choi pulls down Kang-Too Jee's trousers accidentally.As they are fighting, the mad scientist - currently chasing a homeless person she was trying to bribe who stole the money - runs them over.