Follows four families with one thing in common: the dads are in charge of raising the kids. On the first day of school term, four very different men unite to take on the challenges of parenthood, marriage and mateship.

When his ex puts their house up for sale, Justin makes a last-ditch attempt to prove he can be a reliable dad and partner, and Gemma stages an intervention to help Lewis adapt to life as a house husband.

With the clock ticking on his child custody hearing, Justin learns the truth about Rodney's role in the end of his marriage and football career. Lucy has second thoughts after she and Justin decide to move in together.

On the most stressful day of his life, Mark makes a mistake he will regret forever. Justin's custody hearing is interrupted when a school excursion goes horribly wrong.

Mark decides to take responsibility for problems at home and work, but has he left it too late? Abi chooses the worst possible time to volunteer as a parent helper in Miss Nadir's classroom. Kane and Tom's home life is under the microscope.

Justin takes his children camping without telling Nicola, so Rodney calls the police. A head lice infestation breaks out among the children.