Two biological sisters reunited in the sea of people. Their different growth experiences of warmth and cruelty created their different personalities. One is docile and well-behaved, while the other is rebellious at heart. Warmth and kindness resolve the hatred in the heart of the piranha. Although Yan He, whose fate was full of twists and turns, eventually died, the warmth is still in people's hearts. Yan Xi will also continue to move forward with her sister's love and life.