When Dani decides to get fit, she recruits the help of Ruby, an enthusiastic personal trainer, but Ruby enters Dani into a female wrestling competition. Meanwhile, Jack vows to eat more healthily, and Max competes with Ruby's little sister Maisy to make Jack crack and eat something unhealthy.

When Sam has cold feet about leaving her friends to join the NASA training programme, Dani and Jack must show her that she would be crazy not to follow her dream. Besides, however far away Sam is, they will always be her mates.