The 19th season opens in Sydney as the cast moves into new digs Down Under.
KellyAnne develops a crush on Dunbar and clashes with Parisa, dividing the ladies into two camps.
Trisha splits with her boyfriend back home, so she and newly single Shauvon ask out local guys they like. Elsewhere, Parisa and Trisha clash.
Parisa flirts with Dunbar, but he gets closer to Kelly Anne. Meanwhile, Isaac pursues an Irish woman.
KellyAnne and Parisa get over Dunbar, and KellyAnne moves on to her next crush: Cohutta.
KellyAnne and Cohutta kiss, but she can't tell what he's thinking the next morning. Meanwhile, what starts as a small misunderstanding turns into a huge fight between Isaac and Shauvon.
Cohutta romances KellyAnne, but a local Australian also takes her out to dinner. Meanwhile, Dunbar's negativity and temper bother Parisa and Trisha.
Trisha and Cohutta fight, and the gang prepares for Sydney's Mardi Gras, the world's largest gay-pride event. The roomies are excited about the shindig, except for Cohutta, who doesn't want to deal with the crowds, and Trisha, who feels it offends her Christian beliefs.
The roommates learn what their job will be, but their bickering may keep them from getting any work done. Meanwhile, Parisa finds out that some of her housemates are talking about her behind her back.
Parisa and Trisha are involved in a love triangle; Cohutta and KellyAnne remain coy about their mutual attraction.
Shauvon must choose between Australia and her ex, and Cohutta breaks up with KellyAnne because she won't let go of her ex. Meanwhile, Parisa shows that she doesn't understand the rules of flirtation on a trip to the Great Barrier Reef.
New roommate Ashli polarizes the house. Dunbar thinks she's beautiful, but Parisa is immediately put off by her and withdraws from her housemates even more. Meanwhile, Isaac is freshly in love with Noirin, but he manages to mess things up.
Isaac returns from his grandfather's funeral and gives his opinion on the Trisha-Parisa spat.
Cohutta and KellyAnne's relationship takes a turn, and KellyAnne fears she might be pregnant.
The two teams will be judged on the two day itineraries from their jobs. Meanwhile, Ashli and Dunbar argue.
The roomies act as tour guides in Sydney, with one team being close to losing the vacation in Europe due to one members bad attitude and another's drunkenness.
Alex confronts Parisa; the romance between Isaac and Noirin is called into question; and Isaac makes a surprising announcement.