Keys to the Heart - watch online: streaming, buy or rent
We couldn’t find any streaming options in Canada, but Keys to the Heart is available in Japan and 2 other countries on Amazon Prime Video, Hulu, and 9 other services.
Keys to the Heart (2018)
Original Title: 그것만이 내 세상
53%
7.4 (1.8k)2h 0min
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Keys to the Heart is not available for streaming in Canada. After checking 1,546 streaming services, we found the title in 3 other countries.
South Korea 
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Synopsis
An older brother is a washed-up boxer. His younger brother is a genius pianist with physical disability. The brothers make up through their mother who is full of stories of her past.
Videos: Trailers, Teasers, Featurettes
Cast
Lee Byung-hun
Kim Jo-ha
Youn Yuh-jung
In-sook
Park Jeong-min
Jin-tae
Han Ji-min
Ga-yool
Kim Sung-ryung
Ms. Hong
Choi Ri
Soo-jung
Bek Hyun-jin
Dong-soo
Hwang Seok-jeong
Chief Kang
Park Ji-yeon
Yougn In-sook
Moon Sook
Bok-ja
Oh Hye-won
Bok-ja's Guard
Lee Zoo-young
Eun-ha
Ahn Seong-bong
Sky Lounge Manager
Park Ji-hoon
Tae-gu
Park Soo-oh
Young Jo-ha
Yoon Yeong-gyun
Policeman
Son Woo-hyuk
Eun-ha's Boyfriend
Kim Sang-Wook
Jung Yun-ha
Bok-ja's Guard
Jo Kwan-woo
Moon Sung-gi
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