When a college student is murdered in his apartment, the CSI team looks to his roommate and best friend after it's uncovered that he's been printing counterfeit money. However, when the evidence suggests that another party might be involved, the team follows the money trail and finds that a needy record store owner came to confront the student, demanding authentic cash, and then accidentally kills him after a struggle. Meanwhile, Jo is anxious about meeting her son's new roommate and Danny deals with additional strain on his marriage.