David Lowery’s A Ghost Story was filmed in secrecy last summer, both in a response to and with the financial aid from Lowery’s experience creating the big-budgeted Disney remake of Pete’s Dragon. That off-the-grid air is present in the film, feeling like a found artifact or talisman from beyond. But what makes the film really register is the deep well of feeling that made Lowery’s Disney effort more than a retread into familiar emotional territory. Here, Lowery delivers something more than the cosmic and intellectually minded. What surprises in A Ghost Story is that it comes from the heart.