Off Weizhou Island, Guangxi, in southern China’s Beibu Gulf, Bryde whales feed, court, and raise their young, yet face growing threats from unregulated tourism, illegal fishing, and habitat pressures. Over a decade, Chinese and Thai scientists have documented these whales, supported conservation efforts, and engaged local communities to protect them. Filmed over seven years from aerial, surface, and underwater perspectives, this documentary reveals the whales’ secret lives and tells a story of resilience, adaptation, and cross-border scientific collaboration.