Having grown up on an island since childhood, Song Xi returns to the Song family's shipping guild. Faced with suspicion and exclusion from everyone, she relies on her solid navigation experience to repeatedly discover hidden equipment hazards in ships and defuse crises. Amidst the family's internal power struggles, Song Xi relies on evidence and wisdom to dismantle opponents' plots time and again, clearing her own stigma. At the same time, she pursues the truth behind her parents' shipwreck years ago, cooperating with family members to gather clues, and ultimately finding the person responsible behind the scenes, clearing her name of false charges. With the family conflicts settled, Song Xi wins everyone's recognition and becomes the pillar guarding the shipping guild.