An old woman gets asked a simple question she can't answer, so she spends four episodes learning what "mottainai" actually means by living it. The show moves at the speed of real life: slow, attentive, full of small moments that cost nothing but attention. You finish it feeling like you've been sitting with someone who knows how to live without needing much, and that changes how you see your own waste.

A grandmother is left without an answer when her son asks what the Japanese word "mottainai" means. The expression is a common exclamation along the lines of "what a waste!", voicing regret when something is squandered. Unable to explain it, she sets out to learn what the word truly means and why it matters. The four slice of life episodes follow her search.