5 years after he defeated Piccolo, Goku has a family and now lives with Chichi andtheir son, Gohan on Earth. A mysterious warrior from space arrives and threatens their peaceful life. Radditz, the Saiyan warrior, reveals to Goku the secret of his past and he is ready to do anything in order to force Goku to join him.Goku is forced to fight Radditz to rescue his son and is joined by an unexpected ally: the terrible Piccolo! But, their opponent is more cunning than they expected!The end of the battle against Radditz is near, but victory comes at a great cost for Goku and his friends. Collected here for the first time, the first seven epic episodes of Dragon Ball Z.