text: In 2010, Park headlined Kang Woo-suk's blockbuster mystery thriller Moss, playing a young man who comes to a rural village after hearing about his father's death and later becomes embroiled in its hidden secrets.
  Park's casting was received enthusiastically by fans of the source material, Yoon Tae-ho's hugely popular online graphic novel series.
  Heartbeat explores a familial love battle of wills, as Yeon-hee (played by Yunjin Kim of Lost fame) whose daughter is in desperate need of a heart transplant, tries to convince a brain-dead patient's son (Park) to sign off on the transplant, but he refuses and instead investigates his mother's fall. He then appeared in the low-budget indie End of Animal, because he found the script "very interesting."
  Park next starred in War of the Arrows, a fictional tale set in the Joseon period, which follows Nam-yi (Park) on his search for younger sister Ja-in after she is kidnapped by Qing Dynasty soldiers during an invasion. As he slays enemy soldiers with his bow and arrow, he is confronted by Jushinta, a Manchu enemy commander also well known for his archery prowess. Arrow made headlines by selling to distributors from six countries at the Cannes film market and becoming the highest-grossing Korean film of 2011. Park won Best Actor honors at the prestigious Grand Bell Awards and Blue Dragon Film Awards.