[3] In April 2015 the filly was entered in a "breeze up" sale (in which the horses are publicly galloped before being sold) at Doncaster and was bought for £44,000 by the trainer Karl Burke.
[6] Quiet Reflection was from the second crop of foals sired by Showcasing, a stallion who won two of his seven races including the 2009 edition of the Gimcrack Stakes.
Ridden by the apprentice jockey Joey Haynes she went to the front approaching the final furlong and accelerated clear to win by five lengths.
[11] The filly was then moved up sharply in class to contest the Group Two Lowther Stakes at York Racecourse on 20 August when she was again partnered by Haynes.
Graham Lee took over from Haynes when Quiet the filly was sent to Scotland for the Listed Harry Rosebery Stakes at Ayr Racecourse on 18 September.
Easton Angel, who had finished third in the Lowther Stakes was made the odds-on favourite with Quiet Reflection the 8/1 second choice in a sixteen-runner field.
Field of Vision set the pace before Quiet Reflection took the lead inside the final furlong and quickly drew away to win by four lengths.
"[13] In the Cornwallis Stakes at Ascot Racecourse on 9 October the filly started 5/6 favourite, with Field of Vision being the best-fancied of her ten opponents.
After looking outpaced in the early stages she was sent into the lead by Lee a furlong out and went clear to beat Field of Vision "readily" by two and a half lengths.
She began her second season with a trip to France for the Group Three Prix Sigy over 1200 metres at Chantilly Racecourse on 10 April and started the 7/2 second favourite behind the Jean-Claude Rouget-trained Saryshagann.
Racing on heavy ground she took a clear advantage 200 metres from the finish but was hard-pressed in the closing strides before winning by a head from Jimmy Two Times.
[16] On her next start the filly returned to Group Two class for the first time since the Lowther when she ran in the Sandy Lane Stakes on 28 May at Haydock Park.
After being restrained by Costello in the early stages she took the lead a furlong out and drew clear in "impressive" style to win by three and three quarter lengths.
After racing just behind the leaders Quiet Reflection began a strong late run a furlong out, overtook Kachy in the last 100 yards and won by a length.
"[5] Three weeks after her win at Ascot, the filly was matched against older sprinters in the Group One July Cup over six furlongs on good-to-firm ground at Newmarket.
[20] On 3 September Quiet Reflection returned to the scene of her Sandy Lane Stakes victory when she contested the 32Red Sprint Cup and started 7/2 favourite after Limato was withdrawn on account of the soft ground.
Racing on good ground she tracked the leaders but was unable to accelerate in the last quarter mile and finished seventh behind The Tin Man, beaten four and a half lengths by the winner.
After a break of almost four months she returned in the Listed Renaissance Stakes over six furlongs on soft ground at Naas Racecourse on 24 September and went off the 5/2 favourite against nine opponents.