A young and famous movie star is receiving death threats, and Derrick is on the case. Without warning, Warren O'Malley, Derrick's long-forgotten half-brother, arrives in Los Angeles, bringing with him his two formidable younger brothers. The trio is determined to claim their rightful place in the Steele family, or destroy them in the process. With Warren's arrival comes a dark secret from Daniel McAllister's past, one that Daniel is unwilling to reveal. As the tension between Derrick and Daniel begins to unravel their relationship, it also begins to threaten the detective agency itself. When Derrick realizes he is falling in love with the young movie star, he faces a heartbreaking decision. Will Derrick be able to save the young star in time? Can the Steeles pull together as a family to stave off this new series of threats? Will this be the end of the famous Steele Detective Agency?