Taeyang is a guardian angel who has been banished from heaven due to his laziness and is sent to earth in a city known as San Francisco. God will allow Taeyang to come back on one condition: To form a contract with a human, and grant their wish. Taeyang seeing no other choice goes along with his condition.

One night he hears a girl's prayers to god for help in her sleep, and jumps at the opportunity to help her. But would her wish be more than he bargained for??