 He has lost everything—his job, his girlfriend Eva (Sophia Di Martino) and, most devastatingly, his weird and wayward younger sister Alice (Tiani Ghosh), the only family he had left.Alice is now a missing person, having disappeared on a narrow boat trip along with her kindred drifter and boyfriend Toby (Joe Thomas).Zac becomes increasingly frustrated with the futile attempts of the police to find them and, eventually, decides to take matters into his own inexpert hands by starting a terribly executed video blog and scouring the dark canals of the UK in a desperate, perhaps even deluded search for clues.