Sandy Park's life goal is to complete her deceased grandmother's bucket list. Nana, on her deathbed, made Sandy promise to live her life doing the things she wanted to do. "Do not live like me, enslaved by money. I dont want you to live with regrets." So one by one, she started on Nana's bucket list.

On the other hand, Gio Kwon's life has gone considerably dull and boring. Nothing excites him for long. As the youngest and only son of a prominent family, he never lacked for material things. He gets what he wants, does what he wants. He even agreed to his mother's idea to set him up for a blind  date out of sheer boredom.

A bucket list, a cab, rush hour, a rainy day and fate working together, their paths can't help but cross. For everything that is bound to happen was already written in the stars.