For marine biology student Siobhan (Hermione Corfield), it was supposed to be a research excursion with a trawler crew fishing the West Irish seas. But when they hit an unseen object and become marooned, a mysterious parasite infects their water supply.MyMovies, trailer, 2020, Drama, Horror, Neasa Hardiman, Connie Nielsen, Dougray Scott, Hermione Corfield