For thirty years, Iris and her husband Tom diligently tended to a lighthouse by the sea. After Tom retired, he secretly transferred the lighthouse to a developer planning to demolish it for a resort. Unwilling to let the lighthouse disappear, Iris resisted threats and spoke out online, attracting support from netizens, fishermen, and students. A live-streamed event drew hundreds of thousands of viewers, and public pressure forced the developer to abandon the demolition plan. The century-old lighthouse was designated a protected structure, and Iris became its official keeper. Filled with remorse, Tom eventually passed away. As time went on, Iris passed her responsibilities to her young successor, Liam, but the lighthouse's light continues to guide the way home.