With his last breath Uu's friend entrusts him with the secret of how to go to the past. Uu is an engineer and doesn't believe in miracles, but the trick works. In the past there is a pleasant, eternal summer, long hair, girls and Jenkki chewing gum. In his real life, it is autumn, his friends are bitter, the girls are married and his father is seriously ill. At the end of the day, however, Uu has to decide in which time to live his life - in the summer of the past or in the autumn of the present.
May 1939, 3 months before the outbreak of WWII, the future US President, John F. Kennedy, visits Estonia. There his path crosses with two very different girls – a call girl, willing to abandon everything and a sweet local, who is in desperate need of money. The future of the world is crashing around him as he must figure out which is the spy when comes to find out one is working for the Nazis!