We all have secrets that are held close in dark places, kept from stretching into the light of day for fear that only trouble will come our way. But sometimes, shining light on a secret blazes a new path and opens a door that may well have been nailed shut for a long, long time. That is the heart of "Talley's Folly," the Pulitzer Prize-winning romantic comedy by Lanford Wilson that opened the season at Third Avenue Playhouse in Sturgeon Bay.