Martin is first through the gates as the new term started. He is preoccupied by a strange "gurgling" throughout the school and notices water seeping onto the school corridors. Abel has stayed over at Togger's; Tigger thinks he can spring a surprise on the pair but Togger springs him, having been woken early by a cockerel! Andy's tales of his caravanning summer bore Togger, who makes a bet he can wind up Tanya by lunchtime. The bet is safe - Togger charges into Tanya but immediately becomes transfixed by her increased bust size.

Emma has just returned from Indonesia with her mum and her new boyfriend. She has developed a social conscience after seeing children made homeless by the tsunami and more - the antithesis of Tanya who remains her old superficial self. Tanya attracts several male admirers but stays tight-lipped about whether her assets are real. Malachay gets the wrong end of the stick when he finds Togger in the boy's loos. Wally informs him all but a couple of the school's toilets are blocked. Chloe tries winding up Alex, but to her amazement he asserts himself.

Baz returns to school chirpy and takes great pleasure winding Maddie up about how great life is without her. Martin looks on from afar. The sixth form are astonished that Max would be joining them; Maddie is far from impressed with his sleazy attempts at cracking on to her. Baz comes to her rescue, while Kathy is infatuated with Spencer who texts her his every move. A pretty girl comes into the common room and Baz goes off with her. Later on, Maddie finds herself alone with the girl and confronts her, but she doesn't answer. Maddie is mortified when she finally gets the girl's attention; her name is Holly and she is deaf. Togger continues to tail Tanya, in a bid to uncover the reason for her new figure. Tigger brings two remote control cars to school, one disappears into a locked cupboard.

The lads fool Wally into thinking there is water coming from the door so he would unlock it. With Wally's back turned, Ed retrieves the car. Togger splashes his brother with a wet towel; a vengeful Tigger steals bin bags, fills them with water and puts them in Togger's bag, which Jeremy is minding. Togger retrieves his bag and gets a proper soaking. He pours the remaining water over the approaching Tanya; while Abel and Andy laugh, Togger realises he's upset her. Tanya admits she was wearing a false bra to Emma, who suggests it is a reaction to events of last year. Mrs Bassinger announces a "zero tolerance" policy towards uniform and wastes no time setting Miss Adams onto Tanya. Miss Adams orders Tanya not to wear the bra tomorrow.

Baz is forced to tell Holly about his family problems after a chance encounter with Mrs Bassinger. Annie had been ordered to undergo counselling after stealing the laptop and was now at another school. To his amazement Holly dumps him - she had enough problems of her own without taking on his troubles! Maddie gloats and wastes no time flirting with Martin to make him jealous. Togger goes after Tanya and offers her his football shirt; suddenly they are getting on better and he seems to enjoy it. Everyone is sent home early when the drainage problem is found to be worse than thought.