As a way to make friends in a a new town, Olivia volunteers to work at the Heartlake City World Petacular with four other girls. The girls become friends and go on adventures together.
...Heartlake. New Girl in Town: It's the day before the World Petacular and Olivia is helping her veterinarian Aunt Sophie with her mobile clinic. (S1, ep 1)
...Heartlake. Stephanie's Surprise Party: When the girls plan a surprise party for Stephanie's birthday, they discover it's not easy keeping it a secret. (S1, ep 2)
...Heartlake. Dolphin Cruise: The girls enter a science contest and win a trip on a luxury yacht - but not everything goes to plan when they set out to sea. (S1, ep 3)
...Heartlake. Country Girls: The girls are visiting Mia's grandparents when Olivia accidentally knocks down the neighbour's barn - but they promise to rebuild it. (S1, ep 4)
...Heartlake. Emma's Dilemma: Stephanie becomes fixated with beating Tanya in a float-building contest, but Tanya convinces Emma to join her team in revenge. (S1, ep 5)
...Heartlake. Friends of the Jungle: When Olivia's aunt is getting married and the groom goes missing in the jungle, the girls fly out to try to find him. (S1, ep 6)
...Heartlake. Andrea's Big Moment: Popstar Livi comes to Heartlake City for a talent show. The girls decide to enter, but one especially wants to win. (S1, ep 7)
...Heartlake. Kate's Island: The girls leave for science camp where they meet reserved Kate - but they soon realise you shouldn't judge a book by its cover. (S1, ep 8)
...Heartlake. Grand Hotel: The girls help out at the Grand Hotel during what was supposed to be a quiet weekend - until a hotel critic suddenly arrives. (S1, ep 9)
...Heartlake. Getting Out The Vote: It's Stephanie vs Tanya for Heartlake High class president. But when Tanya resorts to dirty tricks, Stephanie reacts. (S1, ep 10)
...Heartlake. Getting The Message: The girls are enjoying Heartlake Amusement Park before Emma types a text to Mia, but sends it to Matthew by mistake. (S1, ep 11)
...Heartlake. Grateful Dud: At the Country Club where she teaches, Mia's heroic rescue of a puppy and horse earns the gratitude of their owner, Fiona. (S1, ep 12)
...Heartlake. The Drooling Detective: When dognappers steal Mia's dog from the Heartlake City Dog Talent Show, it's up to the girls to track down the culprits. (S1, ep 13)
...Heartlake. Rabbitouille: It's Stephanie vs Tanya on a TV bake-off! Stephanie bakes a fabulous cake, but sneaky Tanya steals the recipe. (S1, ep 14)
...Heartlake. Change of Address: Stephanie's mum leaves her in charge of their house for a few days, but everything that could go wrong, does go wrong! (S1, ep 15)
...Heartlake. Dive In: Working summer jobs in Heartlake City is fun and games for the girls, until singing mermaid Andrea gets her very first teenage crush. (S1, ep 16)
...Heartlake. I Told You So: Confined to a wheelchair after a failed Halloween attempt, Emma sees strange goings-on through her hospital window. (S1, ep 17)
...Heartlake. Snow Way: Ace snowboarder Mia finds herself terrified of snowboarding after an accident. Can she overcome her fears and rescue her Fiona? (S1, ep 18)
...Heartlake. Midwinter Night's Dream: When Olivia loses an important science prize to Emma, she breaks off her friendship with Emma and the other friends. (S1, ep 19)