In each episode, Stone introduces himself to a stranger in a grocery store, typically an attractive woman in her 20s or 30s, and asks if she is cooking a meal for someone that night. When the person responds affirmatively, Stone offers his services to help cook dinner. They drive to the participant's house, cook the meal, and then surprise the participant's partner or guest upon their arrival.

While Chef Stone is a tall attractive man, the surprised shopper is usually a woman (typically a younger and attractive woman), so the show relies on faux sexual tension for part of its entertainment value. Chef Stone must "pick up" the woman at the supermarket and convince her to take him home. Jokes about what the woman's husband/partner or neighbors will think when she brings home a strange man in the house are common. There have been a few episodes of men surprising their partners.

Source: Wikipedia.org