Flood: Lady Boss's Teammate Is a Janitor(English-dubbed)

Reborn after her colleagues betrayed her in a flood, elite exec Robyn Shaw tears up her termination notice and becomes a badass. With janitor Martha, she turns an unfinished tower into a fortress. When the flood comes, the former chairman begs. When cold comes, Martha's salted fish saves them all. Nobody could help them, but these two women survived.