Qi Can, a domineering tycoon, suffers from extreme sound sensitivity due to a traumatic incident. To find peace, he chooses Shi Ting—the quietest, mute candidate among high-society marriage prospects—as his fiancée. Yet, during their engagement ceremony, he suddenly begins to hear Shi Ting’s inner thoughts! Shi Ting, aware of her tragic storyline, receives a quest: speak one billion inner words to cure her muteness. Determined to rewrite her fate, she launches into a mental "roast + rant" challenge. On the surface, she acts the part of a devoted fiancée, but internally, she's a one-woman drama show. Qi Can, convinced he's imagining things, tries to dismiss the voices—only to discover that the farther away she is, the louder her thoughts become, pushing him to the edge of insanity. Amidst side-splitting clashes and reluctant compromises, the two grow to understand one another, ultimately discovering a love that defies all odds.