Buck hit a game-high four three-pointers on eight attempts for Indiana in 12 minutes of action. She was able to get several open looks at the basket and capitalized.
Kindell Fincher of Canterbury finished with five points and five rebounds in the victory.
Kentucky struggled form the field, finishing the game 16-of-72 for the game for 22 percent.
Indiana shot 27-of-62 (43 percent) for the game.
Kentucky was led by its Miss Basketball honoree Ivy Brown, who scored 11 points and grabbed seven rebounds.