It's not going well for the dance school, so Isa and her granddad Eliot decides to have an open house to get more students. For the event Isa has made a life-size cardboard version of Lucas.
Isa has figured out that Lucas is crazy for ice tea, so she fills the fridge with his favorite drink. Her best friend Ronja, is not certain that the plan will work.
Isa's dad has gotten a rowing machine, but it doesn't fit well with the dancing school. Isa seeks Ronja's advice but she is occupied with thinking of Zac.
Everyone is going crazy. The downstairs neighbor is rebuilding, causing a lot of noise. How to complain, and at the same time not reveal that you are living in the dancing school?
Isa, Ronja and Zac has to make a presentation in class, on where they wish to be in 10 years. Isa is busy saving Lucas' future, so Ronja and Zac are on their own.
It's Christmas Party at the dancing school and Ronja is betting on whether Isa is brave enough to hand Lucas her love letter before the end of the party.