After The god of destruction Beerus decided to not destroy the Earth, the planet is back again in peace. But, Sorbet and Tagoma, previous Freeza’s servants, decide to revive his leader using the Dragon balls. Succesful in his plan, Freeza decides to return to Earth to start his revenge against the saiyans who humillated him once.
Dragon Ball Z: Resurrection 'F'
One peaceful day on Earth, two remnants of Frieza’s army named Sorbet and Tagoma arrive searching for the Dragon Balls with the aim of reviving Frieza. They succeed, and Frieza subsequently seeks revenge on the Saiyans.