Mr. Flynn visits Dr. Zack to remove a tattoo that has reappeared on his body, only to discover it is a mysterious mark that can only be removed by the person who originally gave it. The mark traces back to a woman he was involved with five years ago, who left the character "Christie" as the tattoo. Suspicious and unsettled, Mr. Flynn insists on investigating this woman further, convinced she is connected to the resurfacing mark. The episode ends with the decision to find out more about the woman behind the tattoo, raising questions about her intentions and their past.