A Long Way Gone is actually autobiographical non-fiction rather than a work of fiction, and thus critics will usually not use the term plot in discussing the main events of the work. Instead, it’s more common to use terms less commonly associated with fiction.
The memoir is an narrative account of Beah’s childhood. He was born in the village Mogbwemo. The village is attacked by an army of rebels. Beah and a few other boys escape the rebels and flee across the river, and eventually take refuge in another village occupied by the army of the government, where they are enlisted as child soldiers. Beah is eventually rescued from the life of a child soldier by UNICEF and leaves Sierra Leone.