Do you believe in love at first sight? Fall out love? Or... maybe in Invisible String? Lallaina 'Leigh' Ira Vega is tired seeking for true love all in her life, kasi sino ba naman ang hindi mapapagod na masaktan sa bawat pag subok mo sa pag-ibig? All she want is to be love, to be taken care of, and... to be pursued. She was traumatized, yes but it doesn't stop her to find the love that she truly deserves. She promised that if ever she will encounter that kind of love, she will give her all... and until she found Archimedes Louis Prudenciado, a meek Pre-Law student. They have the same environment since Leigh is also taking her Pre-Law, they are block mates to be specific. Everyone in their class teased them dahil sa klase sila ang brainy na palaging mag kalaban kapag dating sa mga recitations. What will you do if the person you're not expecting is the one who will make you feel love and to be taken care of? Will you run? Or... Will you take up the opportunity to be love?