The Secret of the Stone Sentinel
Ningning has spent his whole life aboard his grandfather’s tour boat, The Morning Star, exploring the beautiful limestone islands of Ha Long Bay. But one morning, he spots something impossible—a towering rock formation resembling a silent stone guardian, with two mysterious blue lights glowing inside it. When Ningning discovers an old hidden map beneath the boat’s floor, he realizes his great-grandfather may have uncovered the same secret decades earlier.
With his adventurous friend Minh Khoa beside him, Ningning follows the map into a forgotten lagoon and discovers a hidden chamber inside the Stone Sentinel. But the secret isn’t treasure. It is an ancient collection of navigation knowledge designed to protect boatmen from the dangerous waters of the bay. When a sudden storm traps the boys near the Sentinel, Ningning must finally prove that curiosity is only useful when combined with courage, responsibility, and the wisdom to listen.