Luna dwells in an afterlife town and runs a perfume shop. One day, an amnesiac young man named Kai falls through a rift between realms. He carries a ring left by Luna's late husband Felix, and only remembers the unique fragrance blended by Luna herself. The two set out to uncover the truth, unravelling tangled love, hatred and unresolved obsessions spanning multiple lifetimes. It turns out Kai is the embodiment of their lingering regrets. Gradually, Luna lets go of the past and comes to terms with life and death. She chooses to erase her memories and start anew. After reincarnation, she reunites with the equally amnesiac Kai. Having broken free from fate, they stay together for the rest of their lives and embrace a peaceful, happy ending.
