Lok has been suffering from mental disorder for many years. Because of the misunderstanding and discrimination of others, he chooses to keep his illness in secret.

Lok always wanders around in the corridor during sleepless nights and one night, out of coincidence, he meets Yan. His life becomes much colourful after meeting her and they soon fall in love. However, he is wondering if he should tell her the truth. Then, he decides to confess. One night, he finds the opportunity…