Scientist Kazuko (Narumi Yasuda) creates a potion that allows people to travel through time. Before she can try it, tragedy strikes and she ends up in hospital.
As she drifts in and out of consciousness, she tells her daughter, Akari (Riisa Naka), of her desire to meet a mysteriou man named Kazuo Fukamachi (Kanji Ishimaru) at their junior high school lab - in 1972.
Akira decides to take the leap for her mother and find this unexplained Fukamachi. But things don't go according to plan, and she lands in 1974 where she befriends aspiring director Ryota Mizorok (Akiyoshi Nakao). The pair work together to try to solve the mystery surrounding Kazuko, Fukamachi and the year 1972.
Subtle clues are planted throughout the film to help us put together the missing pieces of the puzzle, and the film does a nice job of tying together the loose ends.
While the dynamics of time travel are never fully ironed out and the film has some minor kinks in logic, this is a fun movie about leaping into the past.
And if you can accept the idea of time travel, then you should be able to bear the few absurdities.