Poor international student Lena takes care of Jessica, a wealthy young lady, to cover her younger brother’s medical bills. She is repeatedly bullied by Jessica and scheming rival Simon. Drugged at a party, she meets Vivian, her old childhood acquaintance and economics lecturer. Vivian has searched for Lena for a decade and protects her silently. They expose Simon’s frame-up and the Jiang family’s threats, untie childhood knots and become lovers, relying on each other through hardships.