Violinist Anna Sun finds herself burned out and struggling in her career. Throw in the fact that her longtime boyfriend has just announced he wants an open relationship, and that's enough for a fed-up, emotionally exhausted Anna to embark on a string of one-night stands. After an attempted one-night stand with a certified bad boy (or so she thought) turns into something more, Anna's confronted with a series of life events that may just be more than she can handle. "The Heart Principle" is a heartfelt, vulnerable romance story with more twists and turns than you can imagine — undeniably hot and [emotionally] heavy.