Catch and Kate, who have taken refuge in the bush land across the Sydney harbor near their uncle's home, befriend a zoologist called Christian Faber. The man becomes like a big brother to them. Meanwhile, to safeguard his privacy, the kids' uncle Earle Kandy, decides not to raise the alarm on the kids' disappearance. Christian then drives Catch and Kate to Roselands shopping centre so they buy new clothes to avoid being recognised.