Diverging Timelines: Cutaway 3 - Shattered in the Dust

Recommend reading after Ch. 7 of Book 3 but not necessary. The Doctor has gone to the Meridian Conglomeration in search for a cure to ZBI for Sam Beckett. However, tragedy strikes when Glad is kidnapped by two brothers intent on exacting revenge on the Time Lord. With the help of an old friend, can the Doctor find Glad before she's sold as a sex slave? No sex but some dark stuff.