The episode ends with Murdoch reflecting on the case, impressed by Lucy's resourcefulness and impressed by the cunning of The Chameleon, who remains at large. As the season progresses, whispers spread that The Chameleon's next mark may be closer than they think...
While examining the symbol on the fabric, Murdoch remembers a similar marking on an old case file involving a forger. He realizes that the symbol is a trademark of the counterfeiter, known only as "The Chameleon." Murdoch pieces together the evidence and confronts the culprit: Arthur Wellesley, who not only was behind the forgery ring but also had a personal vendetta against Simpson.
As they question the guests who attended the viewing, they discover that several people had motives to steal the painting. There's Simpson's business rival, Arthur Wellesley, who stood to gain from discrediting Simpson; the reclusive artist, Emma Taylor, who had a public feud with Whistler; and even Simpson's own daughter, Lucy, who has a secret life as an artist and may have seen the painting as a way to fund her own artistic endeavors.
It's the year 1915, and Toronto is abuzz with the news of a new art exhibition featuring the works of the famous Canadian painter, James McNeill Whistler. However, when one of the priceless paintings goes missing, Detective William Murdoch is called in to solve the case.
In a surprising twist, Murdoch discovers that Lucy Simpson was indeed involved in the theft, but not for the reasons he thought. She had been working undercover to help Murdoch solve the case, using her connections to gather information. Her actions, though unorthodox, helped uncover the forgery ring and recover the stolen painting.
