Xia Yan, a girl from the Department of Architecture, was imprisoned in a thirty-two-story building by Song Puyi, the wealthy heir, and became a canary. With a help letter hidden behind the sketch, she summoned Yin Xiao, a boy from the Department of Sculpture - the man who had accompanied her on a rainy night to wait for the rain to stop. When control and love are entangled in a deadlock, and when gentleness becomes the sharpest knife, Xia Yan finally learns one thing in the cage: the only way to break the cage is to break the hand holding the cage.
