S1·E7 The Sun's Playful Play

Milky Holmes, along with Genius 4 visit a beach where it is rumored Baskerville hid his various treasures and researched a way to retrieve lost Toys. As the Gentlemen Thieves were also there planning to rob the place, Arséne joins them as Henriette. When it starts raining, they take shelter in a cave and decide to explore it, but get separated when they trigger some traps. After getting separated by a couple more traps, Sherlock and Nero learn what could possibly be the solution to regaining their Toys. However, they only end up finding a bunch of dolls in a vault which triggers another trap which fills the manor with cold water. With encouragement from Sherlock, Nero manages to get temporary control of her Toys, which heats up the water to hot spring temperature and reunites them with the others.