Jess returns to work after the death of her son but finds her newfound determination put to the test when young patient Archie presents with a lacerated spleen and she suspects possible child abuse. Meanwhile, Mark tries to deal with the news that Chrissie is not his daughter.

Connie's old school boyfriend Peter Holland arrives in the emergency department with a case of rheumatic fever and reveals childhood secrets about Connie. Mark and Lola become very involved in the treatment of two young brothers who have been beaten up. Elsewhere, Mickie loses her drunk patient Liz.