"Original Sin, Part I of V" continued from Wolverine: Origins #28 and X-Men: Legacy #216, and continues in X-Men: Legacy #217.
*What is the secret reason Wolverine joined the X-Men? For years, Logan has been a man without a past, whose memories existed only as conflicting fragments. And Charles Xavier has been a master of his own mind and others. Now the tables are turned, and as Wolverine struggles to rescue his son, Daken, from the evil and darkness that have consumed him, Professor X comes face-to-face with the most terrifying secret of all! *Source: Marvel.com
Also reprints "First Night" from Classic X-Men #1.