When Mother's Day rolls around, Earl remembers that he has never given his mother a good Mother's Day gift. Just as he and Randy are about to finish carrying out his long overdue gift his mother decides her repayment should entail Earl doing something nice for his father Carl. In order to fulfill his promise to his mother, Earl sets out to reclaim his father's classic Mustang, which he lost in a bet as a kid. Meanwhile, Joy's Mother's Day present - a week away from her kids - leaves her missing them all the more.