Complex sentence: Meanwhile, James comes to stay with the Barlows for a while, with no-one knowing that his part in a soup kitchen in town is actually part of a scam, so when Ken discovers this, James packs his things and takes off.
Split into simpler sentences: Meanwhile, James comes to stay with the Barlows for a while, with no-one knowing that his rôle in a soup kitchen in town is actually part of a scam. When Ken discovers this, James packs his things and takes off.