Tintin And The Lake Of Sharks by Hergé

A resourceful young reporter and his loyal dog, aided by an absent‑minded inventor and a gruff sea captain, uncover a criminal plot to steal valuable scientific plans and exploit an isolated lakeside development. Their investigation leads them into an underwater complex where they face gangsters, sabotage and life‑threatening traps, forcing a daring rescue and a race to recover the stolen secrets before they can be used for nefarious ends.