Leona Maguire finished her opening round like a train to surge up the leaderboard into a tie for second at the ISPS Handa World Invitational, just one shot off the leader.
The Cavan woman had three bogeys, three birdies and an eagle (on the par-five third) in a rollercoaster front nine at Galgorm Castle in Co Antrim.
She started her back nine slowly, parring 10 and 11 before bogeying 12, but Maguire then took off. She birdied 13 and picked up shots on 16, 17 and 18 to sign off with a five-under 68 and rocket up to second.
Georgia Hall, Emily Kristine Pedersen and Lauren Coughlin are also on five-under, one off the American Amanda Doherty.
"It's never ideal when you hit your first tee shot out of bounds, but I held in well," Maguire said afterwards.
"I didn't hit the ball particularly well today well off the tee.
"Few dropped shots but putted really nice to keep myself in there. Always nice to finish with three birdies in the end. This course doesn't suit my eye very well, so it will be nice to have a change of scenery."