The wooden ladder movie is the story of a young man named Mehran who is interested in her own work and eventually marries her after much effort. Mehran has a son, Milad, from his previous marriage, who hid this from Marjan at the time of marriage. After a while, Mehran's friend, who took care of the baby, tells Mehran that he can no longer take care of the baby, and this is the beginning of the trouble for Mehran.