No Heart of Greed series is complete without a stirring theme song by Susanna Kwan. The theme song for the third installment is "I Am Innocent" (我本無罪).
Linda Chung sings the sub-theme song, an English tune entitled "I Promise".
The ending theme song is a duet by Vincent Wong and Hana Kuk, named "Hesitate to Speak" (欲言又止).
A look back at the iconic theme songs for the previous two installments:
"Speechless" (講不出聲), Heart of Greed theme song
"Heart Appreciates" (心領), Heart of Greed sub-theme song
"Didn't Intend to Hurt You" (無心害你), Moonlight Resonance theme song
"Love Not Enough" (愛不疚), Moonlight Resonance sub-theme song