Twice Under

The story centers on Ed, a canal expert who becomes embroiled in a murder investigation involving two sewer workers. As the local police seek his expertise, Ed discovers that he is not just helping with the case but is actually being hunted by his former friend Daggat. Daggat seeks revenge for a past incident in Vietnam where Ed's actions left him in a perilous situation.

In a twist of fate, Ed's teenage son, Rick, becomes concerned for his father’s safety and decides to follow him, hoping to assist or take vengeance against Daggat. The film's blend of action and psychological tension makes it a notable entry in the genre, appealing to fans of 1980s thrillers. With its exploration of themes like friendship, betrayal, and familial bonds, Twice Under presents a gritty narrative that resonates with the era's action cinema.