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Mei soon realizes this will be easier said than done-the satellite dish is broken, the supply truck is full of snow, the standby helicopter's main rotor has a snapped blade, and although she contemplates journeying into the Antarctic on foot she backs away. She states that she can't do it alone and she wishes her friends were still there, before Snowball brings her a cup of coffee. She thanks the robot as there is a small power fluctuation, and she decides to find out a way of extending the life of the station's power supply batteries. As she clears away the cryopod status window, she finds the message. The signal is still weak but it is broadcasting on the Overwatch Emergency Frequency. She thinks this might be a rescue message but she has to climb and reinforce the radio tower to know for certain.
Using various parts found around the Ecopoint she constructs a prototype Endothermic Blaster over a period of around two days. Just as she successfully completes an endothermic reaction test but before she has finished the system, the power dies completely; she realizes to her growing horror that in her excitement over the message, she completely forgot about saving power. There are no more batteries left either. Without power the station will eventually become an icy tomb, and neither can she finish the blaster: either way means death. As Mei tries to think of a way to restore power-just enough for her work station-Snowball plugs into the room's charging port and drains it's own batteries
so Mei can finish the prototype. After thanking Snowball, Mei climbs the tower using her blaster to create ice to climb and reinforce a missing section beside a hazardous materials tank, partially covering it. Nearing the top, a loose girder breaks off under her weight: she leaps to safety, but the section strikes the supporting ice below and weakens the tank, causing it to explode and sending the tower toppling over. Dangling by one hand, Mei desperately fires the blaster and is amazed at the resulting large pillars of ice supporting and securing the tower to the ice wall, and finishing climbing as it turns dark.
Using an improvised aerial and her laptop, Mei manages to locate the signal to find it is Winston recalling Overwatch agents to active duty. He asks if she is with him as she looks up at the aurora australis in the night sky, and she says "Yes Winston. I'm with you." After leaving each of her deceased friends' mugs full of fresh coffee at the foot of their cryopods (as a funeral) Mei sets out into the Antarctic on foot with a supply sled and a set of improvised gear-including a solar recharge port for Snowball. Sometime after setting out from the Ecopoint in the cloudless day, Snowball wakes up and Mei tells it "Rise and shine, Snowball. We're on our way!"