Eight-year-old Tuan Tuan unexpectedly gains the ability to understand animals. She and her father run an aquarium on the verge of bankruptcy. From an orca refusing to eat and throwing tantrums, to a great white shark who loves looking beautiful but fears having its teeth pulled, to a dolphin burdened by psychological trauma, Tuan Tuan uses sincerity and patience to understand their troubles and resolve one misunderstanding after another. As the livestreamer Xiaolu records and shares their stories, the aquarium gradually becomes popular. Father and daughter remain committed to treating animals with kindness, resolve conflicts caused by competitors, and help separated beluga whales reunite. In the end, the quiet, aging aquarium transforms into a warm ocean family, where humans and animals take a complete family portrait together.