Susan Plummer is a fictional character from the TV series "The Equalizer". She is portrayed as a skilled and resourceful private investigator who often assists the main character in solving complex cases. Her intelligence and determination make her a valuable ally in the pursuit of justice. In the series, Susan is known for her strong moral compass and dedication to helping those in need. She often uses her investigative skills to uncover the truth and protect the innocent, showcasing her commitment to making a positive impact in her community.