Inside a small shop called the Time Photo Studio, two young men wield extraordinary powers. Toki possesses the photographer to travel back in time, while Hikaru senses exactly what happened the moment a photo was captured. Together, they "dive" into photographs to journey into the past and grant the wishes of those who seek them out. Bound by a strict rule never to alter the past, they must navigate the grief, loss, and regret carried by every client who walks through their door.