Jane (Emily Mortimer) and Michael Banks (Ben Whishaw) have now grown up and find themselves facing new challenges in the global economic crisis.
After the death of his wife Kate the year before, his employer and lender, the same bank where his father and grandfather worked, are now pressuring him and threatening to seize his house.
When Michael's youngest son Georgie (Joel Dawson) flies a kite he found in the park, Mary Poppins (Emily Blunt) miraculously comes back into their lives and helps them overcome their problems and find joy in life again.