When Brett discovers a mysterious portal leading from his basement bedroom in Perth, Western Australia, to the cellar of a boarding school in Galway, Ireland, he can't resist trying it out. Caught near the girl's showers, Brett flees, but is saved by Hannah, a no-nonsense schoolgirl who is about to give him up until he tells her about the portal. With the teachers and police on the lookout for a fugitive, Hannah smuggles her crazy Australian friend back to the cellar and they go through to Perth. Realising that the portal is real, Hannah agrees to keep the incredible ...
Hannah portals from Ireland to get her first look at an Australian beach, but finds herself having to explain to Brett's mother why she is in Brett's bedroom at 7.00 in the morning. Brett and Hannah allow the family to believe that Hannah is an international surfer wanting to borrow a board. Within minutes, Hannah becomes a contestant in a surfing carnival and she can barely swim. Desperate to end the embarrassing situation, Hannah triggers the shark alarm, having no idea of the chaos this will cause.
When Brett is busted on the school grounds by Tara, Hannah comes to the rescue by pretending that Brett is an exchange student looking for work experience. Seamus the caretaker, is keen for help as he has a plumbing problem, an upstairs toilet that has been the repository of years of unwanted breakfast porridge and is well and truly blocked. Brett solves the problem with some Aussie ingenuity.
In the science lab at O'Keefe's, Hannah and Cormac discover the extraordinary magnetic powers of the portal key. In Australia, Brett makes his own discovery, if the key is missing on the other side the portal won't work. Hannah is supposed to be doing her last round of beach cleaning duty and she'll be in trouble with the Beach Ranger if she misses it, but with the portal closed, Brett can't get hold of Hannah and time is running out. Picking up beach litter is bad enough, but having to dress up in Hannah's clothes and wear a wig, really puts a strain on their ...
Asking a colourful Irish busker to pretend to be Hannah's father seemed like a good idea at the time. All he had to do was make a phone call so Hannah could have permission to join Brett's family on a boat trip. Getting himself invited to dinner wasn't part of the plan. Back in Ireland, Hannah's real father arrives at the school for Father's Day. Now she has to race back and forth between countries to look after the two dads.
Brett and his new stepbrother Wayne can't seem to get on, so Craig suggests they go bush for a "bonding" camp. Whilst Brett is away, Hannah decides to portal to Australia and spend a relaxing day at the beach, but the new magnetic security system that Cormac has installed in his room creates havoc. The portal sends a tornado through Brett's home and Cormac gets locked in his room. Hannah's day is ruined, but Brett and Wayne succeed in bonding when Craig has an accident and they have to rescue him.
Keeping the portal a secret has gotten Hannah into a lot of trouble and now she is in Miss Murphy's sights. Having missed her science test whilst diving on a reef in Australia, Hannah persuades Cormac to help her make up marks in the practical exam. Brett thinks that inventing a talking lie detector is not a good idea for people who have secrets. Hannah scoffs until she gets into the exam and finds out that Miss Murphy will be asking the questions.
Hannah goes to portal back to Ireland, but the key is missing. Hannah is stranded in Australia until she and Brett can discover who took the key, but when they find out that Meredith has taken it to the museum, things take a turn for the worse. Dr Ackerman, the museum geologist, has determined that the strange artifact is made from an unknown meteoric ore. She won't give the key up until she has run tests to unlock it's secrets. The test for Brett and Hannah is getting the key back.
Tara finds a photo of Brett and Hannah on a glorious beach and she is convinced that it's proof of their romance. To keep the photo a secret, Hannah is forced to become Tara's slave, but Hannah is only interested in the photo because an Australian lifesaving boat is in the background. Tara hasn't noticed it, but Miss Murphy might. Explaining how she and Brett came to be on a beach in Australia is going to be impossible, so the photo is going to have to disappear.
While preparing to be hostess of 'Founder's Day' at O'Keefe's college, Tara sneaks into town to buy a new dress. Brett offers to show Tara a short-cut back to O'Keefe's, but the journey over rocky fences and through muddy fields culminates in them being baled up in a barn by an escaped bull. Tara is terrified and Brett gets a chance to play the hero, saving them by distracting the bull with Tara's new red dress. The dress is ruined and Tara's fury makes Brett wish he'd stayed with the bull.
Brett falls off a ladder at O'Keefe's and knocks himself unconscious. He wakes up in hospital and makes the doctor believe that he is concussed by insisting that he lives in Australia. While Brett is kept for observation, Hannah has to cover for him in Perth, by taking his place for his family's big day of spring cleaning. Brett persuades Cormac to smuggle him out of hospital. Brett goes back to Perth, unaware that Hannah has done his cleaning jobs. Brett's behaviour makes his family suspicious and when Hannah arrives, she has to clean up again.
When Cormac discovers an old chest of junk at O'Keefe's, Brett takes what he thinks is a worthless old tin soldier as a birthday present for Wayne. Then Miss Langham discovers that the soldier could be a part of a valuable collection and has the whole school searching through the rubbish to find it. Hannah portals to Perth in the middle of the night to get the soldier back, but Wayne is using it in a "Dungeons & Dragons" type of game he secretly plays with his mates. Brett has to persuade Wayne to let him join the game and win the soldier back.
The hot new book "Prince Of Roth" is being launched at midnight all over the world and no-one, not even Tara can get an advance copy, but when Hannah realizes that midnight in Perth is 8 hours ahead of midnight in Ireland, she decides to portal over and get a copy. Meanwhile, Brett and Cormac have illegally wired into Seamus's satellite dish to watch the soccer final, but all they can get is a kid's show which is doing a live link to Australia where the book is about to go on sale. Unfortunately, Miss Murphy surprises them and then stays to watch the show. Whilst ...