Workplace newcomer Wen Xiao is suffocated by complicated work and colleagues' bullying. On a rainy night, she accidentally picks up a down-and-out cat. But fate's surprise comes unprepared: the cat's true identity is her unreachable top boss, Lu Chen. He secretly backs her up, witnessing her sparkling counterattack; she heals his years of old wounds with pure warmth. From guarding to loving each other, one encounter, a lifetime of guarding.