The couples celebrate Christmas with their families. Magnus is worried that he will ruin the celebrating with Frida's family, Ulf celebrates with Christina's family who celebrate Christmas very differently than others and Jenny celebrates with her family.
Ulf and Christina attempt a sure-to-fail get-rich-quick scheme. Frida starts to think that Magnus is childish and immature. Jenny's new boyfriend, the elderly Ernst, goes camping with Ulf and Magnus.
While their apartment is being renovated Ulf and Christina move in with Frida and Magnus who are trying to rekindle their sex life by role playing. Meanwhile, Jenny dates a ninth-grader.
When Magnus and Frida start meeting Magnus's co-worker Janne and his wife Lotta, Ulf and Christina become worried that this may endanger their friendship. Jenny meets a boyfriend who is exactly like her.