After five weeks at sea, the Wildcard is heading to the Port of Karumba for their first unload payday of the season. Coming into shore, Co-Captain Tiger must navigate a rushing tide to make sure the boat docks without damage. When unloaded, the 10 tonnes of boxed and frozen Spanish mackerel will earn the crew $230,000 and provide the vital funds for the next 30 days at sea. The crew are under pressure to return to the fishing grounds as soon as possible to net their $65,000 weekly target.Once back fishing at the ‘Lighthouse Patch', competition heats up between Veteran Tom and Rookie Pete for the biggest catch of the week. Prue takes 3-and-a-half-year-old daughter Ellica out fishing, but a confrontation with a hungry shark puts them both on edge. As the dories find mackerel, the sharks follow – who will come out on top?Later, an illness on board forces a last-minute change of plans as the Wildcard considers an emergency dash to hospital. Vital repair work requires the boat to find and navigate to a secluded, shallow bay. Barnacle build-up on the hull has the crew concerned about damage to the freezers. Repair will require entering crocodile and shark-infested waters.