My Sister, My Friend follows two sisters on a cold winter day in Harlem, New York, after a snowball fight in the school yard. Jill, the youngest sister, is care-free while her older sister, Chris, needs to be perfect. Jill is in trouble for her part in the snowball fight as Chris threatens to tell their mother. Jill must somehow convince her sister not to tell. But, as they get closer to home, the story takes on an unexpected twist with possibly both sisters getting into trouble. Come along with Jill and Chris as they travel home to discover what awaits them at the end of their journey.