With lambing season well underway, Reuben and Jess race to stock-proof the fences at Brough Castle Farm before more than 300 newborn lambs arrive in the fields. However, when Reuben challenges Jess's dad Dave to a battle of man versus machine, Jess is left caught in the middle. Capper and Sonny attempt to breathe life back into a vintage tractor, but getting it to run proves tricky.