Le Notti Bianche movie plot

This is a very simple love story, one side is a promise to meet again after a year, and the other side is a love at first sight for three nights. Between right and wrong, the one who hesitates and struggles is the heroine Natalia. It's the hero Mario who is surprised by the one year of ignorance. On the last night, when Natalia had just put down her defenses and was about to accept Mario's request, she found the man she had been waiting for for a year standing on the bridge over there.