Set in post-war Britain, ten year-old Lewis Aldridge is grief-stricken as he struggles to cope with the death of his beloved mother. Left under the care of his emotionally distant father Gilbert, whom he barely knows and who quickly remarries, Lewis is forced to bury his feelings.
Stu's stag do in South America goes bad when Greg collapses at customs and is found to be full of cocaine. Arrested, the group are taken to an island prison run by cocaine-smuggling siblings, Selma and Branco. Things go from very bad to much worse.