Original: Overhearing Atlas' words, Dr. Tenenbaum, the creator of the Little Sisters, intercepts Jack, and urges him to save the Little Sisters instead, giving him a plasmid that will displace the embedded sea slugs in each Sister.
Simplified: Overhearing Atlas' words, Dr. Tenenbaum intercepts Jack, and urges him to save the Little Sisters instead, giving him a plasmid that will displace the embedded sea slugs in each Sister.