When a terrorist who specializes in explosives takes hold of an underground tunnel, he threatens to kill hostages if his demands are not met.

Ka-long, a wanderlust graduated from the University of Hong Kong, always dreams of backpacking to many countries with his guitar. While he believes he is trapped in Hong Kong, his family thinks that he is simply wasting his life and not settling down for a better future. He is getting more uplifted after he meets Wen-wen, a girl speaks with a Taiwanese accent. While they are dating, Wen-wen makes an effort to hide her true identity from Ka-long. Can they finally resolve the undercurrent of their relationship? Let’s Get Lost ultilises the thematic motif of road movie genre – both protagonists have to embark on a journey of revealing their true identity. As a result, the film widens its scope to the geo-political differences between Hong Kong, Taiwan and China.