Single is related to Unit. Unit is related to Age. Age is related to Vital. 
Story is related to Restore. Restore is a synonym of Repair. Repair is related to Patch. 
Single <--RelatedTo--> Unit <--RelatedTo--> Age <--RelatedTo--> Vital 
Story <--RelatedTo--> Restore <--Synonym--> Repair <--RelatedTo--> Patch 