Singer/songwriter Shawn McDonald has the kind of backstory that’s readymade for a Christian testimonial: a chaotic childhood, lots of drug abuse, arrested in his early 20s on felony charges of possession, growing, manufacturing and dealing marijuana, LSD and a host of other drugs.

“I can’t communicate how crazy I was,” he said in an interview two years ago. “Who I was then and who I am now is like night and day. You name the drug and I was selling it and doing it. I was a confused kid, and my confusion boiled up into bitterness and anger. My life had become a hard, closed shell. What God has done in my life in the last six years is amazing.”

At that low point in his life, while living in Eugene, Ore., McDonald cast a prayer out to a God he had never known. He said God answered, and his life was changed forever.

“I did a 180 and started running in the other direction,” he said.

He also picked up a guitar, and poured out his newfound joy in song, which he has shared with live audiences around the world and in three albums.

Now living in Seattle, he will share his music and his message with a Kitsap audience March 9 when he headlines a concert at the Admiral Theatre in Bremerton.

The concert is sponsored by Serving With All Talents (S.W.A.T.), a youth ministry of the Bremerton Seventh-Day Adventist Christian Church.

Also on the bill is Alli Rogers, who has released her debut album, “Always Eden.”

Rogers didn’t exactly start at the bottom of the musical career ladder. She was singing in her father’s cover band when an Atlantafest talent competition coordinator suggested she enter the musical festival’s song contest. She won, and her career took off.

Rogers wrote all the songs for her album, as well as singing and playing the guitar and co-producing it.

She recently said of the album, “All I want is for the album to move people. There’s something about relating to somebody and recognizing how fragile we all are.”

The young musicians’ music is soft, but not sappy. There is a Christian message, but the songs are accessible to anyone who likes folk-indie-pop music in the vein of Sufjan Stevens, Bell and Sebastian or Amos Lee. And you won’t need earplugs — it will be an acoustic “unplugged” concert, and McDonald’s style has been called “sparse, eloquent and laid-back.”

There will also be visuals, as Seattle artist Scott Erickson will create an original piece of artwork onstage, inspired by the music.