Magnus, Michelle and Marcus will run the Stockholm Marathon and train rock hard. Ann gets a gift card on a plastic surgery by Göran and decides to make a breast enlargement. But when Magnus goes on a date the night before the race it will have consequences both for him and Ann.

Ann will be invited to a reunion with classmates from elementary school in Jakobsberg. Magnus is commissioned by Johanna to talk about contraception with Julia's boyfriend. Michelle is elected new chairman of the parent cooperative Mållgan.