On a day of sudden torrential rain, the busty woman living next door arrives home drenched, only to realize she has lost her keys. Caught off guard by her wet, see-through clothing, the protagonist invites her inside to wait for a locksmith. Once inside, her demeanor shifts; she begins using her soaked, transparent top to seduce him. What starts as a rainy day rescue escalates into an intense relationship fueled by oils and lotions, as they become obsessed with each other in a slick, slippery affair.