Jakira Lumière lives the typical life of a teenage girl in the Italian city of Milan, not counting her extraordinary powers of light. Although being shy, she reveals her heroine ego always at least twice a week alongside her mysterious and shadowy partner, Night, when they are forced to in order to protect their city against the powerful and punctual giant Preciser.

Alex Sameron, Night's hidden identity, is an extremely introverted highschool boy in his late teens. With the quiet and simple life he lives, he could be happy . . . if only he could learn to let go of the painful mysteries of the past as well as the darkness within.

After becoming the best of friends as superheroes for over three years, as well as hopelessly falling in love each other despite the knowledge they cannot touch in normal circumstances because of the agonizing contrast between light and shadow, these two teens meet in normal life. They unknowingly restart their friendship as mortals, but although their relationship is fun and humorous, it seems more like déjà vu than anything else . . .