Starts with Dr. Gero arguing with Android 17 & 18, they kill him quickly. On the ground there's a tiny crack, which is actually his secret basement that contains a super computer which activates immediately after his demise. The CPU then activates Android 14 and 15. Our story begins!
Goku and family are shopping in the mall, Android 14 and 15 find him inside the mall and fight. Goku then notices they're only after him and he leads them out of the mall and into the street. Goku then tells the Androids to follow him so they can fight somewhere else.
Now they're all in a ice terrain, and Android 13 is brought in and wants to fight Goku. Android 14 is fighting Vegeta and 15 is fighting Trunks. Vegeta and Trunks kill their foes and 13 decides to put their parts to good use. With 2 micro chips and 2 bombs, he merges and becomes Super Android 13!
Super Android 13 is very powerful and none of the Z warriors can hurt him, so Goku creates a spirit bomb and absorbs it into himself and obliterates Super Android 13 into nothingness.