Martha starts acting oddly, getting emotional and over-reacting to things. She's horrified to realise that her hormones are kicking in. Lily sympathises - she feels the same. Jas isn't feeling any effects from her hormones but, not wanting to feel left out, decides to fake it. Faced with two seemingly hormonal teenagers, Mrs Fitzgerald and Mr Salford join forces to address their problem. Deciding that exercise is a great antidote, they try to encourage Jas and Martha to join the new street dance class Ms Parfitt is running. Meanwhile, Mrs Griggs has got a girl crush on Ms Parfitt and thinks Ms Parfitt's street dance class is the perfect opportunity to impress her.