Malcolm puts Oliver and Thea in a dangerous situation that lands them on Lian Yu with Oliver's former enemy, Deathstroke. A flashback reveals when Oliver and Maseo returned to Starling City to retrieve the Omega bio weapon, and despite being under strict orders from Amanda Waller not to reveal himself to anyone, Oliver looks in on his family, Laurel and Tommy.

Still weighed down by his last meeting with Ra's al Ghul, Oliver returns home to find a new villain and his crew have started terrorizing Starling City - Michael Amar AKA Murmur, a man whose mouth has been sewn shut. Meanwhile, Laurel and Nyssa bond over their issues with their fathers and Nyssa make Laurel an offer. Thea is forced to come to terms with her father after Oliver brings Malcom to the loft to recover, and Lance shuts out both Laurel and the Arrow.