Cheng Nuannuan, a sunshine-hearted pastry chef with a secret past, accidentally serves a poisoned dessert to the city's most dangerous man—Fu Boyan, a corporate tycoon who survives assassination attempts like morning coffee. When he demands she become his personal food taster, her warmth begins melting his glacial heart. But as their sweet facade deepens, so does the real poison: her family's connection to his enemies. Will love be the antidote... or the final dose?