The Opera House in Boothbay Harbor will present The Lonely Heartstring Band, shown here, on Saturday, March 25; doors for seating open at 7 p.m. and the music starts at 7:30. The bluegrass quintet, which got together in 2012 at Berklee College of Music, combines instrumental virtuosity with soaring three-part harmonies. The group released its first full-length album on the Rounder Records label in 2016. They have performed and headlined at major music festivals and historic venues from New Hampshire to western Canada. Tickets are $15 in advance, $20 on day of show. For tickets, stop by the Opera House box office, at 86 Townsend Avenue; call 633-5159; or visit boothbayoperahouse.com.