After the God of Destruction Beerus decided to not destroy the Earth, the planet is back again in peace. But, Sorube and Tagoma, previous Freeza's servants, decide to revive his leader using the Dragon Balls. Successful in his plan, Freeza decides to return to earth to start his revenge against the Saiya-jin who humiliated him once.
Dragon Ball Z: Resurrection "F"
One peaceful day on Earth, two remnants of Freeza's army named Sorube and Tagoma arrive searching for the Dragon Balls with the aim of reviving Freeza. They succeed, and Freeza subsequently seeks revenge on the Saiya-jin.