Have you ever wished to go back in time when all was simple and you could easily smile? Sunny Severio does. At the age of 26, while living an ordinary life, she grew tired of her constant routine, making her crave the happiness that she had unknowingly lost. Wishing to feel alive again, she was given a chance to return to the age of 16. There, she slowly finds the parts of herself that were lost while growing up and unexpectedly meets new people along the way. As she relives her teenage years, will her new decisions affect the future she knows? And will it be alright for her to stay if she just wants to live her life like yesterday?