Where the Sun Always Shines follows the story of Tom (Per Lasson) and Petra (Lisa Linnertorp), a successful couple who built a large Ica Maxi store in Linköping and sold it for a record amount. They lived a life of luxury in Mallorca with their sons for a month, ready to enjoy an eternal vacation. But their lives take an unexpected turn during Tom's 50th birthday party, prompting his brother Timmy (Erik “Jerka” Johansson) and his wife Maja (Rakel Wärmländer) to move their family to the sunny climate of Mallorca, where chaos ensues.