On a sweltering summer day in Kyoto, a young man heads home, fantasizing about switching on the air conditioner to cool off. But before he can make that dream a reality, disaster strikes in the form of Ozu, who spills soda all over the remote. With the air conditioner rendered completely useless, the man and his friends are left to endure the brutal August heat. Just when all hope seems lost, the group discovers a real-life time machine in their storage room. Unaware of the dire consequences, they decide to travel back in time to retrieve the remote before Ozu even has the chance to ruin it. What awaits them on the other side is a staggering adventure none of them are prepared for.