As preparations begin for the Midsummer party, the sun goes missing from Moominvalley.

Moomintroll learns of Moominmamma's love of hot air ballooning and decides to make her dream come true.

When a lost Hattifattener's spark starts to fade, Moominpappa, the Fisherman and Little My set out to sea to return it home.

After Snufkin advises a silence-loving Hemulen to leave his noisy job at the fairground, he is left to run the rides with the help of his friends.

When Mrs Fillyjonk thinks she is not long for this world, Moominpappa steps in to make all her wildest dreams come true.

Moomintroll cancels his hibernation to go find Snufkin in the mysterious Lonely Mountains, but Snufkin doesn't like having his solitude disrupted.

When Stinky breaks out of jail, the Moomins postpone their winter hibernation to shelter their neighbours and hunt for the fugitive.

Moomintroll and Sniff volunteer to walk Toffle home through the woods, but all is not what it seems.

When Moomintroll accidentally becomes an accomplice to a burglary, the Moomins try to put things right by staging a reverse heist, but nothing goes to plan.

Moomintroll tries to help Snork make friends in the valley using his clever inventions, but Snork's gifts backfire.

When Mr Brisk sets up a summer camp, Little My joins the camp and puts Brisk through a series of rigorous tests.

When Moomintroll's sea adventure ends poorly, he meets Snork and tries to impress his new friend with tall tales. Will his fibs catch up with him?

The Moomins return home to find a 'wise leader' telling everyone there should be no rules, and Moominvalley falls into chaos.