Ave Maria!
The overall 'Plan' [of God] is always the same, but [because of sin] the 'plan' changes.
How can God's plan for all creation be the same but not the same? This statement from the followers of Bl. Jon Duns Scotus seems to be a contradiction. In this episode of The Absolute Primacy of Christ, Fr. Maximilian unravels this mystery by using 2 diagrams from his book to illustrate how God's Plan with a large P - meaning the Absolute Predestination of Jesus and Mary - was always the same, but His plan with a small p was altered, or changed, because of Adam's sin.
Ave Maria!