Zhan Moxiao had built the Underground Building, and Zhan Lingtao suspected there might be a secret associated with the direction of its entrance. After mentioning it to Ou Lan last time, she directly assumed there was a treasure hidden there, probably filled with jewelry, diamonds, and gold.
The last time the two of them agreed to go on a secret treasure hunt, they never actually got around to doing it. Today was a weekend with plenty of time, and since Zhan Moxiao was conveniently not at home, Ou Lan decided to go treasure hunting today.
Although curiosity might kill the cat, she was the type whose curiosity would kill the cat, but she'd still need to know.
And Zhan Lingtao? Having grown up by Zhan Moxiao's side, he was normally calm and wise, but now, completely swayed by Ou Lan, he didn't think about right or wrong, feasibility or not. If she said go, he never objected.
