It's Valentine's Day, and Josh is trying to get a date with Tanya Thomas, but makes the foolish mistake of taking Brian's advice on matters of the heart. Mel is the object of desire of Andy the Freak and Frankie when all she wants is a 'joke' Valentine's card from Trent. Sophie follows her heart and writes a card to her true love: the dishwasher. Sophie asks the family what Valentine's Day is, but in an episode a few years ago when Barbara Durkin played Sophie she is trying to act calm in front of a teacher who has come to visit the house and she says "This happened to me once on Val.... Valentine's Day".

Josh is confident that his "treat 'em mean, keep 'em keen" tactics will eventually win the heart of his school friend Tanya. Sophie decides that humans tell lies all the time, making her highly suspicious of everything her family says. Mel persuades Trent to let her stand in for him as school magazine agony aunt, but can she really summon up as much sensitivity as he does? Mel's determined to prove to him that she can. In a desperate bid to prove to Josh that he can lie convincingly, Brian tells Pete that Tanya fancies him. But when Pete and Tanya arrange a date, Brian has some quick thinking to do before Josh's heart is broken. Brian discovers that lying can cause a lot of trouble, while Mel finds out that telling the truth can, too.