Sam is a mentally handicapped person with only 7 years of intelligence who does a simple job at Starbucks.
At the beginning of the film, he becomes a "star dad", oh no, a new dad, it seems that this time Starbucks did not miss the sponsorship fee.

There is an introduction that the wandering woman gave birth to a daughter for him, and I don't quite agree. What is it to have a child for him, and his IQ will take the initiative to have a child? I think it was the homeless woman who found him in order to solve her physical needs and accidentally had a child. Then he also abandoned Sam and the child.
Speaking of watching Sam holding such a young Lucy to buy a milk powder diaper, I was really worried about turning around and hitting the child's head.
But with the help of well-meaning neighbors and friends with equal disabilities, Lucy grew up day by day, and she was very beautiful and very intelligent.
Isn't it a bit like this scene in Guess the Train?
Later, Lucy's growth flash mob is still very touching, and the same touch I also felt in "Flying House Tour".
Life always has twists and turns, and a birthday event triggers a conflict that causes Sam to lose Lucy.
It's just that Sam, with his innocent heart, not only let Lucy grow up, but also infected everyone around him, female lawyers, Starbucks store managers, and couples raising families, they all reached out to Sam.
Because of some problems of parents, leading to the loss of custody of children, this is found in many film and television works, such as Liang Jiahui's "Gua Sha", which is a good work that makes people cry.
"I Am Sam" is also the leader of this type of film, although there are some places that feel a little sensational, and some places where the bridge section is a little old, but this true feeling can still move us. That's why it ranks No.151 in the Douban Top 250.
Opposing counsel has been in court on the grounds that Sam's low IQ is the case to prove that Sam cannot educate the children well. And I think that our children are more than ours, if only by the parents' IQ to measure whether they can educate children, then how can there be high-quality students in the mountains? Isn't it normal for children to be better than their parents?
To this, Sam replied.
For parents to be able to accompany their children, educate their children to have a healthy character, and make children full of love, is the most important, not just knowledge.