Here is a brief summary of the story:

Excitement stirs in Mr. Hart's classroom when he tells his students about a new project.
One of his students Ernie appears surprised and disappointed. Mr. Hart quickly opens with a heartwarming story about a boy named Simon, who with the help of his grandma, learns a new craft. Simon's grandma, being an avid knitter, spends much of her time knitting scarfs and gloves to donate to a local homeless shelter. After Simon visits the shelter with his grandma, Simon decides he would like to knit to help the homeless he encountered along the way. Simon's holey patch leads him to something greater than anything he ever imagined! Student Ernie also discovers the meaning of helping others in need and the true identity of his teacher, Mr. Hart.