The Lovesickness Stone was an item they obtained during the second challenge, which allowed the users to determine if the other person was in danger based on the intensity of the stone's glow.
Su Tang held the Lovesickness Stone representing Gaiyin's life and health. By observing that the glow hadn't changed much since their departure, it seemed they hadn't encountered any danger.
So, the three sat side by side in front of the floor-to-ceiling window, eagerly looking in the direction they had left from.
Suddenly, Xi'en stood up from the floor and pressed himself against the window, staring intently outside.
It startled Qiu Mo, "Xi'en, what are you doing?"
Xi'en turned his head, a look of surprise on his face, and muttered, "They seem to be coming back."
At his words, both Su Tang and Qiu Mo also leaned against the window, but all they could see was darkness, nothing else was visible.