Josh is confident that his 'treat 'em mean, keep 'em keen' tactics will eventually win the heart of his school friend Tania. 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 the sensitivity to do it? In a desperate bid to prove to Josh that he can lie convincingly, Brian tells Pete that Tania fancies him. But when Pete and Tania arrange a date, Brian has some quick thinking to do before Josh's heart is broken.