Select Ayane and play through story mode until you fight 
Kasumi in the White Storm level. Knock her off the ledge into 
the ice cave. When you are in the cave, finish the fight. 
When you KO her you have to knock her at least ten feet away. 
The FMV sequence shows you shooting a blue smoke object at her 
instead of the normal sequence of you saying, "You Runaway Shiobi" 
Note: Some practice may be required to get the correct ending to 
the fight.