The life of Naya, a minimarket cashier girl, is often plagued by unfortunate and unlucky events. Until one day, she receives an interesting offer from a mysterious shop to swap the path of her fate with the destiny of others.
Naya lives and grows in an environment full of misery and endless problems. It's in this dark moment that Master offers Naya the opportunity to exchange her fortune. Naya visits the Fortune Exchange Store and tries the lives of businessman Sato, politician Meri, chef Riko, and ballerina Lala. As part of their lives, Naya discovers many shortcomings and intricate problems within the lives.