Instagram stories disappear after 24 hours. So can you view an old story you missed?
Unfortunately, once the 24 hours pass, stories are gone — even external tools can't retrieve them. But there are exceptions.
If the person saved their story to Highlights, you can view it anytime. DarkViewer lets you view Highlights anonymously and download them.
If you regularly follow someone's stories, use DarkViewer daily so you never miss one. Download important stories before they disappear!